When Emissary of Soulfire enters, you get
![Energy](/Handlers/Image.ashx?size=small&name=e&type=symbol)
![Energy](/Handlers/Image.ashx?size=small&name=e&type=symbol)
(three energy counters).
Pay
![Energy](/Handlers/Image.ashx?size=small&name=e&type=symbol)
![Energy](/Handlers/Image.ashx?size=small&name=e&type=symbol)
: Put an exalted counter on target creature you control. Activate only as a sorcery.
(Whenever a creature you control attacks alone, it gets +1/+1 until end of turn for each instance of exalted among permanents you control.)