Last One Standing

During this turn, if your creature was the sole
survivor of combat in which at least one other
creature died, put a +2/+2 counter on the
surviving creature. It also gets an emblem,
"Whenever this creature attacks alone it gets
+1/+1. Whenever this creature attacks or blocks
with one or more other creatures also attacking or blocking with it, all of your attacking or blocking creatures get +2/+2."