When Octoprophet enters the battlefield, scry 2. (Look at the top two cards of your library, then put any number of them on the bottom of your library and the rest on top in any order.)

When Omnath, Locus of the Roil enters the battlefield, it deals damage to any target equal to the number of Elementals you control.

Landfall — Whenever a land enters the battlefield under your control, put a +1/+1 counter on target Elemental you control. If you control eight or more lands, draw a card.

When Overgrowth Elemental enters the battlefield, 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.

: Each creature you control named Pack Mastiff gets +1/+0 until end of turn.

Phantom Warrior can't be blocked.

Destroy all nonland permanents.

, : Return target creature you control and each Aura attached to it to their owners' hands. Activate only during your turn.

All creatures able to block Prized Unicorn do so.

Return target creature or land card from a graveyard to its owner's hand. You gain 6 life.

Target creature you control deals damage equal to its power to target creature you don't control.

Flying

When Rapacious Dragon enters the battlefield, create two Treasure tokens. (They're artifacts with ", Sacrifice this artifact: Add one mana of any color.")

Reduce to Ashes deals 5 damage to target creature. If that creature would die this turn, exile it instead.

When you next cast an instant spell, cast a sorcery spell, or activate a loyalty ability this turn, copy that spell or ability twice. You may choose new targets for the copies.

Flying (This creature can't be blocked except by creatures with flying or reach.)

When Riddlemaster Sphinx enters the battlefield, you may return target creature an opponent controls to its owner's hand.

Menace (This creature can't be blocked except by two or more creatures.)

At the beginning of your upkeep, discard a card.

Rugged Highlands enters the battlefield tapped.

When Rugged Highlands enters the battlefield, you gain 1 life.

: Add or .

Whenever another blue creature enters the battlefield under your control, target player mills two cards.

: Return Sanitarium Skeleton from your graveyard to your hand.

When Savannah Sage enters the battlefield, you gain 2 life.

Choose two target players. Each of them searches their library for a card, then shuffles and puts that card on top.

Whenever Scorch Spitter attacks, it deals 1 damage to the player or planeswalker it's attacking.

: Add one mana of any color.

: Target creature becomes the color or colors of your choice until end of turn.

Deathtouch (Any amount of damage this deals to a creature is enough to destroy it.)

Flying (This creature can't be blocked except by creatures with flying or reach.)

Vigilance (Attacking doesn't cause this creature to tap.)

Other creatures you control have vigilance.

This spell can't be countered.

Protection from blue (This creature can't be blocked, targeted, dealt damage, enchanted, or equipped by anything blue.)

: Shifting Ceratops gains your choice of reach, trample, or haste until end of turn.

Shock deals 2 damage to any target.

When Skeleton Archer enters the battlefield, it deals 1 damage to any target.

Enchant creature

When Sleep Paralysis enters the battlefield, tap enchanted creature.

Enchanted creature doesn't untap during its controller's untap step.

, : Sorcerer of the Fang deals 2 damage to target opponent or planeswalker.

+1: Up to one target creature gets +2/+0 until end of turn.

−2: Sorin, Vampire Lord deals 4 damage to any target. You gain 4 life.

−8: Until end of turn, each Vampire you control gains ": Gain control of target creature."

Sorin's Thirst deals 2 damage to target creature and you gain 2 life.

: You gain 1 life.

Vigilance

Squad Captain enters the battlefield with a +1/+1 counter on it for each other creature you control.

Vigilance (Attacking doesn't cause this creature to tap.)

When Steadfast Sentry dies, put a +1/+1 counter on target creature you control.

Swiftwater Cliffs enters the battlefield tapped.

When Swiftwater Cliffs enters the battlefield, you gain 1 life.

: Add or .

Counter target activated ability, triggered ability, or legendary spell.

Temple of Epiphany enters the battlefield tapped.

When Temple of Epiphany enters the battlefield, scry 1.

: Add or .

Temple of Mystery enters the battlefield tapped.

When Temple of Mystery enters the battlefield, scry 1.

: Add or .

Temple of Triumph enters the battlefield tapped.

When Temple of Triumph enters the battlefield, scry 1.

: Add or .

Other Vampires you control get +1/+1.

This spell can't be countered.

Target opponent reveals their hand. Exile all noncreature, nonland cards from that player's hand and graveyard.

Haste

Whenever Thunderkin Awakener attacks, choose target Elemental creature card in your graveyard with toughness less than Thunderkin Awakener's toughness. Return that card to the battlefield tapped and attacking. Sacrifice it at the beginning of the next end step.

Deathtouch (Any amount of damage this deals to a creature is enough to destroy it.)

Lifelink (Damage dealt by this creature also causes you to gain that much life.)

Whenever Tomebound Lich enters the battlefield or deals combat damage to a player, draw a card, then discard a card.

Flying (This creature can't be blocked except by creatures with flying or reach.)

Whenever Trusted Pegasus attacks, target attacking creature without flying gains flying until end of turn.

Target creature gets +1/+1 and gains double strike until end of turn. (It deals both first-strike and regular combat damage.)

When Undead Servant enters the battlefield, create a 2/2 black Zombie creature token for each card named Undead Servant in your graveyard.

Return target creature to its owner's hand.