Everything that follows is just my opinion, but I at least did some research for you first
That version of the mechanic made enough sense in the context of FINAL FANTASY and FINAL FANTASY XIV, which inspired these Equipment cards
Back Ultimecia, Omnipotent Legendary Creature - Nightmare Warlock Menace (This creature can't be blocked except by two or more creatures.) Time Compression - When this creature transforms into Ultimecia, Omnipotent, take an extra turn after this one
It sets your creature to 7/7 in stats, which means it gets worse the bigger your creature is normally
Xavier Sal, Infested Captain Just like Cayth, Famed Mechanist, we have Xavier Sal, Infested Captain, further proof that players love proliferate and populate, and Wizards knows it
He gets more than he bargained for when he meets Princess Ashe, the sole surviving heir to the Dalmascan throne, thought dead since the war