When Overgrowth Elemental enters, put a +1/+1 counter on another target Elemental you control.

Whenever another creature you control dies, you gain 1 life. If that creature was an Elemental, put a +1/+1 counter on Overgrowth Elemental.

Kicker (You may pay an additional as you cast this spell.)

Destroy target artifact if its mana value is 2 or less. If this spell was kicked, destroy that artifact if its mana value is 5 or less instead.

Impending 5— (If you cast this spell for its impending cost, it enters with five time counters and isn't a creature until the last is removed. At the beginning of your end step, remove a time counter from it.)

Whenever Overlord of the Balemurk enters or attacks, mill four cards, then you may return a non-Avatar creature card or a planeswalker card from your graveyard to your hand.

Impending 4— (If you cast this spell for its impending cost, it enters with four time counters and isn't a creature until the last is removed. At the beginning of your end step, remove a time counter from it.)

Flying

Whenever Overlord of the Floodpits enters or attacks, draw two cards, then discard a card.

Impending 4— (If you cast this spell for its impending cost, it enters with four time counters and isn't a creature until the last is removed. At the beginning of your end step, remove a time counter from it.)

Whenever Overlord of the Mistmoors enters or attacks, create two 2/1 white Insect creature tokens with flying.

Freerunning (You may cast this spell for its freerunning cost if you dealt combat damage to a player this turn with an Assassin or commander.)

Untap all creatures you control that attacked this turn. If it's your main phase, there is an additional combat phase after this phase, followed by an additional main phase.

Counter target spell unless its controller pays for each artifact you control.

Creatures you control get +3/+3 and gain trample until end of turn. (Each of those creatures can deal excess combat damage to the player or planeswalker it's attacking.)

First Contact — Whenever Overseer of Vault 76 or another creature you control with power 3 or less enters, put a quest counter on Overseer of Vault 76.

At the beginning of combat on your turn, you may remove three quest counters from among permanents you control. When you do, put a +1/+1 counter on each creature you control and they gain vigilance until end of turn.

At the beginning of your upkeep, if you have four or more creature cards in your graveyard, you may return target creature card from your graveyard to your hand.

Menace

Whenever Overt Operative deals combat damage to a player, it assembles a Contraption. (Put the top card of your Contraption deck face up onto one of your sprockets.)

Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for or one mana of that creature's color.)

Creatures you control get +3/+3 until end of turn.

When Overwhelmed Archivist enters, draw a card, then discard a card.

Disturb (You may cast this card from your graveyard transformed for its disturb cost.)

Creatures you control gain vigilance and trample until end of turn. Roll a d20.

1–9 | Creatures you control get +2/+2 until end of turn.

10–19 | Put two +1/+1 counters on each creature you control.

20 | Put four +1/+1 counters on each creature you control.

Whenever you attack with three or more creatures, draw a card.

This spell costs less to cast for each creature card in your graveyard.

Exile target creature or planeswalker.

Until end of turn, creatures you control gain trample and get +X/+X, where X is the greatest power among creatures you control.

Flying

Ward—, Pay 3 life.

Whenever you cast a noncreature spell, create X 1/1 red Phyrexian Goblin creature tokens, where X is the mana value of that spell. They gain haste until end of turn.

When Ovinomancer enters, sacrifice it unless you return three basic lands you control to their owner's hand.

, Return Ovinomancer to its owner's hand: Destroy target creature. It can't be regenerated. That creature's controller creates a 0/1 green Sheep creature token.

Whenever a creature deals damage to a player, that player may say "Ow" once for each permanent named Ow. If the player doesn't, Ow deals 1 damage to them.

Flying

When Owl Familiar enters, draw a card, then discard a card.

Mama's Coming — Whenever Owlbear Cub attacks a player who controls eight or more lands, look at the top eight cards of your library. You may put a creature card from among them onto the battlefield tapped and attacking that player. Put the rest on the bottom of your library in a random order.

Flying

Ward—Pay 3 life. (Whenever this creature becomes the target of a spell or ability an opponent controls, counter it unless that player pays 3 life.)

When Ox of Agonas enters, discard your hand, then draw three cards.

Escape—, Exile eight other cards from your graveyard. (You may cast this card from your graveyard for its escape cost.)

Ox of Agonas escapes with a +1/+1 counter on it.

Affinity for Equipment (This spell costs less to cast for each Equipment you control.)

Trample

When Oxidda Scrapmelter enters, destroy target artifact.

Oyaminartok, Polar Werebear has hexproof if it hasn't dealt damage yet.

Whenever Oyaminartok deals combat damage to a player, create a Food token.

, Sacrifice a Food: Draft a card from Oyaminartok's spellbook. When you do, add . Spend this mana only to cast blue creature spells.

If one or more +1/+1 counters would be put on an artifact or creature you control, that many plus one +1/+1 counters are put on it instead.

, : Put a +1/+1 counter on target artifact or creature you control. Activate only as a sorcery.

Cycling (, Discard this card: Draw a card.)

Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for or one mana of that creature's color.)

Target creature gets +3/+3 until end of turn.

Counter target spell.

At the beginning of your next upkeep, pay . If you don't, you lose the game.

Create a 4/4 red Giant creature token.

At the beginning of your next upkeep, pay . If you don't, you lose the game.

Artifacts you control have hexproof. (They can't be the targets of spells or abilities your opponents control.)

At the beginning of your upkeep, if you control the artifact with the highest mana value or tied for the highest mana value, draw a card.

Whenever an opponent is dealt 3 or more damage by a single source, that player discards a card.

Target player draws two cards and loses 2 life.

When you unlock this door, exile the top two cards of your library. You may play them until the end of your next turn.

(You may cast either half. That door unlocks on the battlefield. As a sorcery, you may pay the mana cost of a locked door to unlock it.)

Roll two six-sided dice. Return any number of cards with total mana value X or less from your graveyard to your hand, where X is the total of those results. Exile Pair o' Dice Lost.

At the beginning of each upkeep, if you lost life last turn, put a +1/+1 counter on Paladin of Atonement.

When Paladin of Atonement dies, you gain life equal to its toughness.

Toxic 6 (Players dealt combat damage by this creature also get six poison counters.)

Paladin of Predation can't be blocked by creatures with power 2 or less.

At the beginning of your end step, put an influence counter on Palantír of Orthanc and scry 2. Then target opponent may have you draw a card. If that player doesn't, you mill X cards, where X is the number of influence counters on Palantír of Orthanc, and that player loses life equal to the total mana value of those cards.

Until end of turn, if a player taps a nonbasic land for mana, it produces colorless mana instead of any other type.

Whenever another creature you control with power 5 or greater enters, you may return target creature card from your graveyard to your hand.

Draft Paliano Vanguard face up.

As you draft a creature card, you may reveal it, note its creature types, then turn Paliano Vanguard face down.

Other creatures you control of a type you noted for cards named Paliano Vanguard get +1/+1.

Flying

When Palinchron enters, untap up to seven lands.

: Return Palinchron to its owner's hand.

Flying, vigilance, trample

Palladia-Mors, the Ruiner has hexproof if it hasn't dealt damage yet.

At the beginning of your upkeep, put a spore counter on Pallid Mycoderm.

Remove three spore counters from Pallid Mycoderm: Create a 1/1 green Saproling creature token.

Sacrifice a Saproling: Each creature you control that's a Fungus or a Saproling gets +1/+1 until end of turn.

: Target creature gets +0/+2 until end of turn. Activate only during your turn, before attackers are declared.

Whenever a player plays a land, return Pangosaur to its owner's hand.

, Sacrifice Panic Spellbomb: Target creature can't block this turn.

When Panic Spellbomb is put into a graveyard from the battlefield, you may pay . If you do, draw a card.

: The next face-down creature spell you cast this turn costs less to cast.

If turning a face-down permanent face up causes a triggered ability of a permanent you control to trigger, that ability triggers an additional time.

Whenever Pantlaza, Sun-Favored or another Dinosaur you control enters, you may discover X, where X is that creature's toughness. Do this only once each turn. (Exile cards from the top of your library until you exile a nonland card with that mana value or less. Cast it without paying its mana cost or put it into your hand. Put the rest on the bottom in a random order.)