What this allows you to do with Myrkul on the battlefield is put enough -1/-1 counters on these Creatures to put them into your graveyard yourself, then choose to have them come back as Enchantments
Nemata, Primeval Warden Saprolings are an archetype thats all about sacrificing the tokens, and Nemata, Primeval Warden is the best commander for this
You wisely have an untapped Island and a Brainstorm in hand
(7/13/2016) Becoming a land may cause other Auras to become illegally attached
The first official mutant was Mistform Mutant in Onslaught , although Goblin Mutant from Ice Age was mutated (erratad) with the creature type mutant later on
Deny Existence: Dissipate at common, same casting cost, but single blue instead of double blue mana