Sin, Unending Cataclysm (Extended Art) [FIC - 185] Sorcery You may cast a spell

You may cast a spell from among the exiled cards without paying its mana cost if you exiled four or more cards this way

Rules Text Contains: All creatures have double strike and attack each combat if able

Rules Text Contains: Vanishing 4 (This enchantment enters the battlefield with four time counters on it

it's an Aura spell with enchant creature

Rules Text Contains: Mirage Mesa enters the battlefield tapped

Sin, Unending Cataclysm (Extended Art) [FIC - 185] Sorcery You may cast a spellRarity: R #: 185 Creature Type or Sub Type: Legendary Creature Leviathan Avatar P: 5 T: 5 Rules Text Contains: Flying, trample As Sin enters, remove all counters from any number of artifacts, creatures, and enchantments. Sin enters with X +1 +1 counters on it, where X is twice the number of counters removed this way. When Sin dies, put its counters on target creature you control, then shuffle this card into its owner's library.