Exile it at the beginning of the next end step or if it would leave the battlefield
Not only that, but receiving a promotional card for a movie that I have seen in the theater would make that card even more special to me, and I'm sure for many other fans as well
Weirdly enough, this actually worked until Mr
Remember, there are better, more meta ways to build an Emerald/Steel deck, but this list maintains the core Robin Hood/Hyena/Ping identity
Sure, there are other moist creature types out there, but Merfolk are pretty consistently hard to deal with and incredibly powerful, and what more can you really ask for from a bunch of Creatures that like chilling out on river beds and stuff
Scion Summoner, Eldrazi Skyspawner, and Catacomb Sifter all represent reasonable cards that can let our powerful five-drop enter the battlefield ahead of schedule or simply create multiple bodies to pump later on