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.)
Search your library for a creature card with converted mana cost X or less and put it onto the battlefield. Then shuffle your library.

, Sacrifice a creature: The next time a source of your choice would deal damage to any target this turn, prevent that damage.

Each creature gets +1/+1 for each other creature on the battlefield that shares at least one creature type with it. (For example, if two Goblin Warriors and a Goblin Shaman are on the battlefield, each gets +2/+2.)

Counter target spell unless its controller pays .
Cycling (, Discard this card: Draw a card.)
When you cycle Complicate, you may counter target spell unless its controller pays .

When Corpse Augur dies, you draw X cards and you lose X life, where X is the number of creature cards in target player's graveyard.

Corrupt deals damage to any target equal to the number of Swamps you control. You gain life equal to the damage dealt this way.

This spell can't be countered.
Counter target spell you don't control.
Overload (You may cast this spell for its overload cost. If you do, change its text by replacing all instances of "target" with "each.")

Whenever a creature becomes the target of a spell or ability, return that creature to its owner's hand. (It won't be affected by the spell or ability.)

As an additional cost to cast this spell, sacrifice a creature.
Add .

Whenever you cast a creature spell, you may pay . If you do, draw a card, then discard a card.

At the beginning of your upkeep, reveal the top card of your library and put that card into your hand. You lose life equal to its converted mana cost.

Deal Damage deals 4 damage to any target.
Gotcha — If an opponent says "deal" or "damage," you may say "Gotcha!" When you do, return Deal Damage from your graveyard to your hand.

Target player loses 1 life and you gain 1 life.
At the beginning of your upkeep, if you have more cards in hand than each opponent, you may return Death of a Thousand Stings from your graveyard to your hand.

Deep-Sea Serpent can't attack unless defending player controls an Island.

Destroy target land. Its controller loses 2 life.

When Diabolic Servitude enters the battlefield, return target creature card from your graveyard to the battlefield.
When the creature put onto the battlefield with Diabolic Servitude dies, exile it and return Diabolic Servitude to its owner's hand.
When Diabolic Servitude leaves the battlefield, exile the creature put onto the battlefield with Diabolic Servitude.

You may exile a blue card with converted mana cost X from your hand rather than pay this spell's mana cost.
Counter target spell if its converted mana cost is X.

Morph (You may cast this card face down as a 2/2 creature for . Turn it face up any time for its morph cost.)
When Echo Tracer is turned face up, return target creature to its owner's hand.

, : You may put a creature card from your hand onto the battlefield.