The first damage step is for creatures with first or double strike and the second is for every other creature without those keywords
This announcement comes as the result of many fans in the community having requested greater collectibility for cards in the game, and will start taking place in the ninth set, Fabled
I just hope that remains as we get more live results.
Here's what you need to understand when playing with and against MtG cards with the mutate keyword: Mutating creatures don't enter the battlefield If you cast a creature for its mutate cost and it successfully mutates, it isn't considered to have entered the battlefield

Monster Abyss Shark Dream Shark Qu Squirrel Shark Big Jaws Surfacing Lifeless Leaffish Xyz Remora Buzzsaw Shark Jet Shark Kurama Shark Fishborg Harpooner Lantern Shark Armored Shark Beautunaful Princess Magic Aqua Jet Surface Armored Exes Foolish Burial Goods Promotion to the Seven Emperors RUM-Sword of the Seven Emperors Seven Emperors of Space and Time Harpie's Feather Duster Trap Ice Barrier Xyz Revive Splash Full Armored Xyz Virtue Stream Xyz Poseidon Splash Extras CX-N-As Ch Knigh FA-Dark Knight Lancer Number C101: Silent Honor DARK CNumber 32: Shark Drake Revise Exes Armor Fortress Valiant Shark Lancer Number 32: Shark Drake N-As-H Knight Stealth Kragen Spawn Number 101: Silent Honor ARK Bahamut Shark FA-Hope Ray Lancer FA-Black Ray Lancer Rivature Dragon Number 4: Stealth Kragen Shark Deck Yu-Gi-Oh
Randomly select 1 card in your opponents hand and declare 1 type (Monster, Spell or Trap), then reveal that card, and if it is the declared type, inflict 500 damage to your opponent