2021 pikachu pokemon card Vmax Japanese 25th Anniversary S8a-G #006 PSA 10 – Yamacardo have for your premier collection. 2021 Pikachu Card | eBay

Up until now, we've never really had a card that just outright gives a poison counter to an opponent

Sure, the ceiling on a creature like Legion Warboss is pretty high if it isnt answered, but theres not really a lot of work you have to do to make that happen, really

Clearly a reanimation target, this black creature is particularly annoying to get rid of and can provide a bunch of card advantage, too

Edit: Just read that your post says ones given away with purchase, so maybe you dont want to include this one in your list

BREAKpoint (2016) BREAKpoint expanded on the new gold BREAK mechanic while throwing in heavy-hitters like Greninja BREAK and Mega Gyarados-EX