The toxic mechanic was introduced in Phyrexia: All Will Be One , which is just another word for the poisonous mechanic
We could think of about 10 situations where playing You Came Back just wins the game
Its no Tajuru Pathwarden, and the enters the battlefield effect is likely to do little work most of the time, but this is a lot of effect for not too much mana
While not available as a commander option, you can also speed up the ThreatenThreatens by combining this with Sigurd, Jarl of RavensthorpeSigurd, Jarl of Ravensthorpe, though you wouldn't be getting much utility out of Chapter IV
If youd like to see how Ive done in the past to see what Ive been right or wrong about, you can check out my last four Top 20 lists here: Top 20 Standard Cards from Rivals of Ixalan Top 20 Standard Cards from Ixalan Top 20 Standard Cards from Hour of Devastation Top 20 Standard Cards from Amonkhet I wont be including any reprints in Core Set 2019 that are already in Standard
3 Il Mheg Pixie