Serra Ascendant: I don't want to go off on a tangent about this card so I'll try to stay focused this is an insanely good card (not overpowered though.) If played turn 1 it will gain you around 6-18 life (never once has it gained me more) and drain each opponent 6 each
Additionally, you can pay 1 White mana to unattach an Equipment from a creature you control
Alas, like many of us, owning that holo Charizard card was never part of my path in life, and the amount of money that one of these rare and expensive Pokemon cards sells for these days, means I will probably never have the funds to own one
Consider what they discard, what they create, and how well they help the rest of your deck do what it already does best
Providing a use for excess mana at the end of the turn, Autonomous Assembler can slowly get bigger while consistently punching in with Vigilance