Whenever a player plays a spell that counters a spell that has been played or a player plays a spell that comes into play with counters, that player may counter the next spell played or put an additional counter on a permanent that has already been played, but not countered.

When Aria of Flame enters the battlefield, each opponent gains 10 life.

Whenever you cast an instant or sorcery spell, put a verse counter on Aria of Flame, then it deals damage equal to the number of verse counters on it to target player or planeswalker.

When Bazaar of Wonders enters the battlefield, exile all graveyards.

Whenever a player casts a spell, counter it if a card with the same name is in a graveyard or a nontoken permanent with the same name is on the battlefield.

Whenever you cast a spell of a type showing on CARDNAME, put a counter over that type and draw a card. If all five types on CARDNAME have counters over them, sacrifice it and draw one more card. BOX artifact BOX creature BOX enchantment BOX instant BOX sorcery

Noncreature spells cost more to cast.

Whenever a player casts a noncreature spell, put a collection counter on Charitable Levy. Then if there are three or more collection counters on it, sacrifice it. If you do, draw a card, then you may search your library for a Plains card, put it onto the battlefield tapped, then shuffle.

Whenever a player casts a spell without asking your permission while casting it, counter that spell.

When a player asks you permission to cast a spell and you refuse, counter that spell and sacrifice Common Courtesy.

Enchant player

Whenever enchanted player casts a spell, put a spite counter on Curse of Vengeance.

When enchanted player loses the game, you gain X life and draw X cards, where X is the number of spite counters on Curse of Vengeance.

As Declaration of Naught enters the battlefield, choose a card name.

: Counter target spell with the chosen name.

Whenever Dragon-Kami's Egg or a Dragon you control dies, you may cast a creature spell from among cards you own in exile with hatching counters on them without paying its mana cost.

Flying

Whenever the fourth spell of a turn is cast, flip Erayo, Soratami Ascendant.

Whenever you cast an instant or sorcery spell, put a charge counter on Firemind's Research.

, Remove two charge counters from Firemind's Research: Draw a card.

, Remove five charge counters from Firemind's Research: It deals 5 damage to any target.

Imminent Doom enters the battlefield with a doom counter on it.

Whenever you cast a spell with mana value equal to the number of doom counters on Imminent Doom, Imminent Doom deals that much damage to any target. Then put a doom counter on Imminent Doom.

Whenever an opponent casts a creature spell that doesn't share a color with a creature you control, counter that spell unless that player pays , where X is its mana value.

: Counter target black spell.

When an opponent casts a spell, sacrifice Lunar Force and counter that spell.

Whenever a spell you've cast is countered, draw a card.

Whenever a player casts a spell, counter it unless that player pays .

Whenever a player casts an enchantment spell, counter it.

Whenever you cast a creature spell, you may put a quest counter on Quest for the Holy Relic.

Remove five quest counters from Quest for the Holy Relic and sacrifice it: Search your library for an Equipment card, put it onto the battlefield, attach it to a creature you control, then shuffle.

Enchant land

Enchanted land has ": Counter target spell unless its controller pays ."

, Sacrifice an enchantment: Destroy target enchantment.

: Counter target enchantment spell.