Through the Breach (Invocation) [Amonkhet Invocations] Merfolk Shaman {T}: Destroy target land

{T}: Destroy target land

Reverse Type: Legendary Planeswalker — Gideon +2: Up to one target creature an opponent controls attacks Gideon

Set: Tempest Type: Artifact Rarity: Rare Cost: {1} {3}

Then that player loses all unspent mana and you add the mana lost this way

Set: Magic 2010 Type: Instant Rarity: Rare Cost: {W} Your opponents can't cast spells this turn

Through the Breach (Invocation) [Amonkhet Invocations] Merfolk Shaman {T}: Destroy target landSet: Amonkhet Invocations Type: Instant Arcane Rarity: Mythic Cost: {4}{R} You may put a creature card from your hand onto the battlefield. That creature gains haste. Sacrifice that creature at the beginning of the next end step. Splice onto Arcane {2}{R}{R} (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.)