I'll get in on this too!
Thontu, Octar Omni 2UB
Legendary Plainswalker - Thontu {Mythic}
+2 : Put 2 0/1 Tentacle tokens onto the battlefield
0 : Sacrifice an Octopus or Tentacle creature, draw a card
-6 : Create an emblam with "Sacrifice a Tentacle token: tap target creature. It does not untap during it's owner's next untap phase."
{3}