Turn to Frog

Instant

Polymorphist's Jest

Instant

Frogify

Enchantment — Aura

Serpentine Ambush

Instant

Omnibian

Creature — Frog

Ichthyomorphosis

Enchantment — Aura

Vodalian Mystic

Creature — Merfolk Wizard

Snakeform

Instant

Merfolk Thaumaturgist

Creature — Merfolk Wizard

Tideshaper Mystic

Creature — Merfolk Wizard

Neurok Transmuter

Creature — Human Wizard

Tidal Visionary

Creature — Merfolk Wizard

Reef Shaman

Creature — Merfolk Shaman

Quickchange

Instant

Very Cryptic Command

Instant

Amoeboid Changeling

Creature — Shapeshifter

Mordenkainen's Polymorph

Instant

True Polymorph

Instant

Mind Transfer Protocol

Instant

Sea Snidd

Creature — Beast

Mercurial Pretender

Creature — Shapeshifter

Unnatural Selection

Enchantment

Mistform Mutant

Creature — Illusion Mutant

Prismwake Merrow

Creature — Merfolk Wizard

Turtleshell Changeling

Creature — Shapeshifter

Spellskite

Artifact Creature — Phyrexian Horror

Argent Mutation

Instant

Ego Erasure

Kindred Instant — Shapeshifter

_____

Creature — Shapeshifter

Gift of Tusks

Instant

Transmogrify

Sorcery