If an opponent searched their library this turn, you may pay {0} rather than pay this spell’s mana cost.

Target opponent mills thirteen cards.

If four or more creatures are attacking, you may pay {1}{W} rather than pay this spell’s mana cost.

Arrow Volley Trap deals 5 damage divided as you choose among any number of target attacking creatures.

If an opponent had an artifact enter the battlefield under their control this turn, you may pay {1}{G} rather than pay this spell’s mana cost.

Create a 4/4 green Beast creature token.

If a noncreature permanent under your control was destroyed this turn by a spell or ability an opponent controlled, you may pay {G} rather than pay this spell’s mana cost.

Create four 1/1 green Snake creature tokens.

If you’ve been dealt damage by two or more creatures this turn, you may pay {R} rather than pay this spell’s mana cost.

Inferno Trap deals 4 damage to target creature.

If an opponent had two or more lands enter the battlefield under their control this turn, you may pay {3}{R}{R} rather than pay this spell’s mana cost.

Destroy two target lands. Lavaball Trap deals 4 damage to each creature.

If three or more creatures are attacking, you may pay {U} rather than pay this spell’s mana cost.

Attacking creatures get -3/-0 until end of turn.

If an opponent cast three or more spells this turn, you may pay {0} rather than pay this spell’s mana cost.

Exile any number of target spells.

If an opponent gained life this turn, you may pay {B} rather than pay this spell’s mana cost.

Target player loses 5 life and you gain 5 life.

If a white creature is attacking, you may pay {B}{B} rather than pay this spell’s mana cost.

Exile target attacking creature. Create a token that’s a copy of that creature. Exile it at the beginning of the next end step.

If an opponent had a green creature enter the battlefield under their control this turn, you may pay {U} rather than pay this spell’s mana cost.

Tap up to two target creatures. Those creatures don’t untap during their controller’s next untap step.

If exactly one creature is attacking, you may pay {W} rather than pay this spell’s mana cost.

Destroy target attacking creature without flying.

If an opponent had three or more cards put into their graveyard from anywhere this turn, you may pay {0} rather than pay this spell’s mana cost.

Exile target player’s graveyard.

If an opponent cast a red instant or sorcery spell this turn, you may pay {W} rather than pay this spell’s mana cost.

Prevent the next 3 damage that a source of your choice would deal to you and/or permanents you control this turn. If damage is prevented this way, Refraction Trap deals that much damage to any target.

If an opponent cast a blue spell this turn, you may pay {R} rather than pay this spell’s mana cost.

Change the target of target spell with a single target.

If an opponent drew three or more cards this turn, you may pay {R} rather than pay this spell’s mana cost.

Runeflare Trap deals damage to target player equal to the number of cards in that player’s hand.

If a black creature with flying is attacking, you may pay {G} rather than pay this spell’s mana cost.

Destroy target attacking creature with flying.

This spell costs {1} less to cast for each attacking creature.

Create a 6/12 colorless Construct artifact creature token with trample. Exile it at the beginning of your next end step.

If a creature spell you cast this turn was countered by a spell or ability an opponent controlled, you may pay {0} rather than pay this spell’s mana cost.

Look at the top seven cards of your library. You may put a creature card from among them onto the battlefield. Put the rest on the bottom of your library in any order.

If an opponent had two or more creatures enter the battlefield under their control this turn, you may pay {U} rather than pay this spell’s mana cost.

Return two target creatures to their owners’ hands.