If your life total is less than your starting life total, this spell costs less to cast, where X is the difference.

Whenever you cast a noncreature spell, create an X/X blue Shark creature token with flying, where X is that spell's mana value.

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

When you cycle Shark Typhoon, create an X/X blue Shark creature token with flying.

, , Return Shigeki, Jukai Visionary to its owner's hand: Reveal the top four cards of your library. You may put a land card from among them onto the battlefield tapped. Put the rest into your graveyard.

Channel — , Discard Shigeki: Return X target nonlegendary cards from your graveyard to your hand.

The "legend rule" doesn't apply to Slivers you control.

Each Sliver creature card in your graveyard has encore , where X is its mana value.

Encore (, Exile this card from your graveyard: For each opponent, create a token copy that attacks that opponent this turn if able. They gain haste. Sacrifice them at the beginning of the next end step. Activate only as a sorcery.)

: Shuffle your library.

: Look at the top X cards of your library, then put them back in any order.

Return two target creature cards from your graveyard to your hand unless any player pays .

Counter target spell unless its controller pays , where X is the greatest power among creatures you control.

This spell costs less to cast, where X is the amount of life you gained this turn.

Trample

At the beginning of your end step, if you gained life this turn, you may cast Sproutback Trudge from your graveyard.

Create a 4/4 white Angel Warrior creature token with flying and vigilance. If this spell was foretold, create X of those tokens instead.

Foretell (During your turn, you may pay and exile this card from your hand face down. Cast it on a later turn for its foretell cost.)

Discard your hand, then draw two cards. (Then exile this card. You may cast the creature later from exile.)

Creatures you control get +2/+2 until end of turn.

Reinforce X— (, Discard this card: Put X +1/+1 counters on target creature.)

, : Tap X target noncreature artifacts.

, : Untap X target noncreature artifacts.

When Taj-Nar Swordsmith enters the battlefield, you may pay . If you do, search your library for an Equipment card with mana value X or less, put that card onto the battlefield, then shuffle.

Whenever one or more noncreature permanents are returned to hand, draw a card. This ability triggers only once each turn.

, Return a land you control to its owner's hand: Return target artifact or enchantment card with mana value X or less from your graveyard to the battlefield. Activate only as a sorcery.

Choose one —

• Look at the top X cards of your library. Put up to two of them into your hand and the rest on the bottom of your library in a random order.

• Counter target spell unless its controller pays twice .

Assist (Another player can pay up to of this spell's cost. You choose the value of X.)

Support X. (Put a +1/+1 counter on each of up to X target creatures.)

Each creature with a +1/+1 counter on it gains trample until end of turn.

This spell costs less to cast, where X is the greatest power among creatures you control.

: Add . You gain 2 life.

Whenever a nontoken creature enters the battlefield under your control, put a +1/+1 counter on it and draw a card.

: Add .

, : Add one mana of any color.

, : The Mycosynth Gardens becomes a copy of target nontoken artifact you control with mana value X.

This spell costs less to cast, where X is the greatest power among creatures you control.

Whenever one or more nontoken creatures you control die, create a green Fungus Dinosaur creature token with base power and toughness each equal to the total power of those creatures.

, : Double target creature's power until end of turn.

, : Target opponent reveals cards from the top of their library until an artifact card or X cards are revealed, whichever comes first. If an artifact card is revealed this way, put it onto the battlefield under your control and sacrifice Thought Dissector. Put the rest of the revealed cards into that player's graveyard.

At the beginning of your upkeep, surveil 1. (Look at the top card of your library. You may put that card into your graveyard.)

Exile a card from your graveyard: Add . Spend this mana only to cast a spell that's one or more colors without in its mana cost.

Sacrifice an artifact. If you do, search your library for an artifact card. If that card's mana value is less than or equal to the sacrificed artifact's mana value, put it onto the battlefield. If it's greater, you may pay , where X is the difference. If you do, put it onto the battlefield. If you don't, put it into its owner's graveyard. Then shuffle.

: Add . Spend this mana only to cast spells with mana value 5 or greater or spells with in their mana costs.

, : Draw a card, then discard a card.

If it's neither day nor night, it becomes day as Vadrik, Astral Archmage enters the battlefield.

Instant and sorcery spells you cast cost less to cast, where X is Vadrik's power.

Whenever day becomes night or night becomes day, put a +1/+1 counter on Vadrik.

Flying

: Prevent the next X damage that would be dealt to you this turn. If damage is prevented this way, Vengeful Archon deals that much damage to target player or planeswalker.

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

Saproling creatures and other Treefolk creatures get +1/+1.

When Verdeloth the Ancient enters the battlefield, if it was kicked, create X 1/1 green Saproling creature tokens.

Put a +1/+1 counter on target creature, then double the number of +1/+1 counters on it.

Flashback . This spell costs less to cast this way, where X is the greatest mana value of a commander you own on the battlefield or in the command zone. (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Exchange control of two target creatures you don't control.

Flashback . This spell costs less to cast this way, where X is the greatest mana value of a commander you own on the battlefield or in the command zone. (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Each opponent sacrifices an artifact. For each artifact sacrificed this way, you create a Treasure token.

Flashback . This spell costs less to cast this way, where X is the greatest mana value of a commander you own on the battlefield or in the command zone. (You may cast this card from your graveyard for its flashback cost. Then exile it.)

, , Discard a card: Look at the top X cards of your library. You may put a creature card with mana value X or less from among them onto the battlefield. Put the rest on the bottom of your library in a random order.

Volcano Hellion has echo , where X is your life total. (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.)

When Volcano Hellion enters the battlefield, it deals an amount of damage of your choice to you and target creature. The damage can't be prevented.

: Put X +1/+1 counters on target land you control. That land becomes a 0/0 Elemental creature with haste. It's still a land.

: This turn, creatures can't attack unless their controller pays for each attacking creature they control.

Madness (If you discard this card, discard it into exile. When you do, cast it for its madness cost or put it into your graveyard.)

Gain control of target creature if its toughness is 2 or less. If this spell's madness cost was paid, instead gain control of that creature if its toughness is X or less.

, : Target player mills X cards.

Morph (You may cast this card face down as a 2/2 creature for . Turn it face up any time for its morph cost.)

Vigilance

: Spells you cast this turn that are white and/or blue cost less to cast, where X is the amount of life you gained this turn. Activate only as a sorcery.

Reach

Wren's Run Hydra enters the battlefield with X +1/+1 counters on it.

Reinforce X— (, Discard this card: Put X +1/+1 counters on target creature.)