Illuna, Apex of Wishes

Mutate {3}{R/G}{U}{U} (If you cast this spell for its mutate cost, put it over or under target non-Human creature you own. They mutate into the creature on top plus all abilities from under it.)
Flying, trample
Whenever this creature mutates, exile cards from the top of your library until you exile a nonland permanent card. Put that card onto the battlefield or into your hand.
Card Type Breakdown
Land
41% – 24 cards
Creature
31% – 19 cards
Sorcery
8% – 5 cards
Artifact
3% – 2 cards
Instant
7% – 4 cards
Planeswalker
5% – 3 cards
Enchantment
4% – 2 cards
Frequent Cards
Land
Stomping Ground 100%
Breeding Pool 97%
Steam Vents 91%
Temple of Abandon 72%
Command Tower 72%
Temple of Epiphany 69%
Thornwood Falls 69%
Temple of Mystery 69%
Ketria Triome 66%
Swiftwater Cliffs 63%
Creature
Gemrazer 59%
Parcelbeast 59%
Migratory Greathorn 59%
Trumpeting Gnarr 50%
Sea-Dasher Octopus 50%
Pouncing Shoreshark 47%
Paradise Druid 47%
Everquill Phoenix 44%
Uro, Titan of Nature's Wrath 44%
Auspicious Starrix 44%
Sorcery
Genesis Ultimatum 50%
Migration Path 41%
Mythos of Illuna 38%
Storm's Wrath 38%
Finale of Devastation 25%
Circuitous Route 22%
Beanstalk Giant // Fertile Footsteps 19%
Flood of Tears 16%
Satyr's Cunning 13%
Stolen by the Fae 13%
Artifact
The Great Henge 44%
Ketria Crystal 34%
Arcane Signet 22%
Embercleave 13%
Chromatic Lantern 9%
Mana Geode 9%
Nyx Lotus 6%
Mirror Shield 6%
Izzet Locket 3%
Shadowspear 3%
Instant
Growth Spiral 41%
Lazotep Plating 22%
Neutralize 22%
Once Upon a Time 16%
Sinister Sabotage 16%
Opt 16%
Fire Prophecy 16%
Anticipate 13%
Tale's End 13%
Unsummon 13%
Planeswalker
Nissa, Who Shakes the World 38%
Chandra, Awakened Inferno 31%
Vivien, Monsters' Advocate 31%
Lukka, Coppercoat Outcast 19%
Domri, Anarch of Bolas 19%
Vivien, Champion of the Wilds 16%
Ugin, the Ineffable 16%
Tamiyo, Collector of Tales 16%
The Royal Scions 16%
Chandra, Acolyte of Flame 13%
Enchantment
Rhythm of the Wild 34%
Kiora Bests the Sea God 28%
Omen of the Hunt 25%
Song of Creation 19%
Guardian Project 16%
Mirror March 13%
Shark Typhoon 9%
Season of Growth 9%
Fires of Invention 9%
Primal Empathy 6%