Thunderclap
Mercadian Masques — Common
Instant
Sets Thunderclap has been printed in:

Mercadian Masques — Common
Instant
Sets Thunderclap has been printed in:

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Instant
If it's your turn, you may sacrifice a Mountain rather than pay this spell's mana cost.
Mine Collapse deals 5 damage to target creature or planeswalker.
Enchantment — Room // Enchantment — Room
When you unlock this door, this Room deals 6 damage to target creature an opponent controls. You gain life equal to the excess damage dealt this way.
(You may cast either half. That door unlocks on the battlefield. As a sorcery, you may pay the mana cost of a locked door to unlock it.)
Access Maze
Once during each of your turns, you may cast a spell from your hand by paying life equal to its mana value rather than paying its mana cost.
(You may cast either half. That door unlocks on the battlefield. As a sorcery, you may pay the mana cost of a locked door to unlock it.)
Instant — Trap
If you've been dealt damage by two or more creatures this turn, you may pay rather than pay this spell's mana cost.
Inferno Trap deals 4 damage to target creature.
Legendary Planeswalker — Sarkhan
+1: Dragon cards in your hand perpetually gain "This spell costs less to cast," and "You may pay rather than pay this spell's mana cost, where X is its mana value."
+1: Conjure a card named Shivan Dragon into your hand.
-2: Sarkhan, Wanderer to Shiv deals 3 damage to target creature.
Instant — Arcane
Torrent of Stone deals 4 damage to target creature.
Splice onto Arcane—Sacrifice two Mountains. (As you cast an Arcane spell, you may reveal this card from your hand and pay its splice cost. If you do, add this card's effects to that spell.)
Instant
As an additional cost to cast this spell, sacrifice a creature or enchantment or pay .
Betrayer's Bargain deals 5 damage to target creature. If that creature would die this turn, exile it instead.
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