For example, with Yixlid Jailer ("Cards in graveyards lose all abilities") on the battlefield, a Me with a counter on it in a graveyard loses that counter when it's put onto the battlefield
Teferi's Isle is weak, although it has a use with untapping when it's phased in in certain combo decks
For Bloomburrow I was really focused on referencing real-world animal photos and the amazing world guide reference that Wizards of the Coast put together for us all. I read that you played Magic in the 1990s
Akroma's Will Ancient Copper Dragon Atraxa, Grand Unifier Gix, Yawgmoth Praetor Kinnan, Bonder Prodigy Najeela, the Blade-Blossom Nyxbloom Ancient Purphoros, God of the Forge Ragavan, Nimble Pilferer Ranger-Captain of Eos Rhystic Study Thrasios, Triton Hero Urza, Lord High Artificer Vial Smasher the Fierce Yawgmoth, Thran Physician
It wont be hard to upgrade this one into an absolute monster, and though it isnt my favorite, I have to admit this is probably the objectively strongest of the four