The downsides
If Permeating Mass becomes a copy of another creature before its triggered ability resolves, the damaged creature will become a copy of that creature
Grand Master of Flowers Known as the Platinum Dragon, Bahamut is the patron and progenitor of the metallic dragons
The "number-for-number" construction is used in Magic to indicate that you are spending some number of cards to obtain another number of cards-worth of value
Agent Venom Anti-Venom, Horrifying Healer Coat with Venom Elderfang Venom Merchant of Venom Pooling Venom Psychic Venom Skithiryx, the Blight Dragon Torment of Venom Venom Venom Blast Venom Connoisseur Venom Sliver Venom's Hunger Venom, Deadly Devourer Venom, Eddie Brock Venom, Evil Unleashed Venom, Lethal Protector Venomcrawler Venomized Cat Venomous Breath Venomous Brutalizer Venomous Changeling Venomous Dragonfly Venomous Fangs Venomous Hierophant Venomous Vines Venomsac Lagac Venomspout Brackus Venomthrope
Most blue decks run some kind of bounce spell, and its often directed at creatures, so youll lose very little by replacing Into the Roil with this
