(It's an artifact with ", Sacrifice this token: Add one mana of any color.") Other creatures you control enter with an additional +1/+1 counter on them for each mana from a Treasure spent to cast them
Fusion Strike, our newest Pokmon TCG set, arrives with a bang
We have a four-mana kill spell in mono-Green (assuming you do it correctly, of course), then it pumps something, then it resurrects that same huge thing we used to kill the other thing
You've got several ways of making those merfolk unblockable (such as Rogue's Passage), and plenty of ways to break a stale board state in Curse of the Swine and Wave Goodbye
Having been so focused on Commander until now, I think this is going to be a big player in Standard
If you control an Urza's Mine and an Urza's Tower, add instead