Aethersquall Agents

Whenever Aethersquall Agents deals combat
damage to a player, you get that much {e} (energy counters).
{e}{e}{e}: Put a +1/+1 Counter on Aethersquall
Agents. Activate only as a Sorcery.
{1}{u}, {e}: Aethersquall Agents gains Shroud and
"This creature can't be blocked" until the end of
this turn.