Norn Emissary

Trample, Ward {5}
Ravenous (This creature enters with X +1/+1 counters on it. If X is 5 or more, draw a card when it enters.)
Singular Purpose— Choose target player or planeswalker to be your Singular Purpose. When Norn Emissary attacks that target it gains +2/+2 till the end of turn. If Norn Emissary dies while attacking its Singular Purpose it gets regenerate {3}{g/u}{r/g}{u/r} till end of next turn and may be regenerated from exile (regeneration only happens once.)