Cateran Slaver [Mercadian Masques] Merfolk Spellshaper we shall be ready for

we shall be ready for them

If a player does

transform Legion's Landing

Set: Urza's Legacy Type: Legendary Creature — Elemental Rarity: Rare Cost: {4}{G}{G} Shroud (This creature can't be the target of spells or abilities

If your opponent manages to topple your Machina Citadel

Cateran Slaver [Mercadian Masques] Merfolk Spellshaper we shall be ready forSet: Mercadian Masques Type: Creature Horror Mercenary Rarity: Rare Cost: {4}{B}{B} Swampwalk (This creature can't be blocked as long as defending player controls a Swamp.) {5}, {T}: Search your library for a Mercenary permanent card with mana value 5 or less, put it onto the battlefield, then shuffle.