pokemon booster.box 151 Booster Box (Japanese) dazzling holo Pokemon Japanese Mask of Change

Yes, a four-mana activation cost is a lot, and only flipping into a nonlegendary creature means the ability isn't as strong as it could be, but the amount of times I've seen this flip into a Blightsteel ColossusBlightsteel Colossus is insane

Chaos Number 40: Gimmick Puppet Of Dark Strings only lets the player draw a card upon destroying enemy monsters via effect, not battle too

It looks like a nice green creature for Commander and a sideboard or maindeck threat for Standard because some decks will have a hard time dealing with it

Though realistically all of these do very little, it adds another layer of excitement and mythos to the TCG

The rings let me copy any of Cromats effects or any other activated ability in the deck