Aether Gem

Aether Gem enters the battlefield tapped.
Lifelink
{t} if there are five or more charge counters on
Aether Gem remove all counters from it, Aether
Gem deals 1 damage to each creature your
opponents control, if no charge counters where removed this way, put a charge counter on Aether
Gem and deal 1 damage to any target.