Phantasmal Terrain [Summer Magic / Edgar] Rivals of Ixalan Whenever Lightning Skelemental deals combat

Whenever Lightning Skelemental deals combat damage to a player

but first you must believe

Set: Alpha Edition Type: Sorcery Rarity: Rare Cost: {X}{U}{U}{U} Destroy X target Mountains

Set: Mystery Booster Type: Artifact Creature — Construct Rarity: Rare Cost: {6} Triskelion enters the battlefield with three +1/+1 counters on it

Reverse Type: Sorcery — Adventure Add one mana of any color

Phantasmal Terrain [Summer Magic / Edgar] Rivals of Ixalan Whenever Lightning Skelemental deals combatSet: Summer Magic Edgar Type: Enchantment Aura Rarity: Common Cost: {U}{U} Enchant land As Phantasmal Terrain enters the battlefield, choose a basic land type. Enchanted land is the chosen type.