Tavros Nitram

{2}{g}, {t}: You may gain control of target Beast an opponent controls. Add two mana of any color.
.
If Tavros Nitram would die, instead put a -2/+1
token on it. If this would reduce its power to 0,
put Tavros Nitram into the graveyard anyway.
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"Thanks for your help, but I don't, uh, need your
help. I've got too much self-esteem for that, I think."