Its nice to see space being played with that I havent seen seriously used since Lathril, Blade of the Elves, and this thing is one Wound Reflection away from annihilating the table
Combined with the buff abilities of common Rat inclusions like Ashcoat of the Shadow Swarm or Karumonix, the Rat King, the Song of Totentanz can end a game outright
Specifically, if umbra armor's effect is applied, the enchanted creature does not become tapped and is not removed from combat as a result
You can do that when you need early game ramp and it can even be used for something like reanimator strategies as you can cycle it, make a token, and use that token as, say, Dread Return fodder
CREATURES THAT ONLY NEED TO ATTACK ONCE FOR INSANE VALUE While getting a trigger twice when you Warp a creature is great, there are some creatures that dont have nearly as many triggers that are also great, simply because they have one insanely powerful effect, and gaining access to it for only three mana is likely to drastically alter the complexion of a game