The Dawn Blade

Ascend (If you control ten or more permanents,
you get the blade's blessing for the rest of the game.)

Whenever equipped creature attacks, put a +1/+1 counter on each creature you control. If you have
the blade's blessings, put two +1/+1 counters on
each creature you control instead.

Equip {3}
The mighty blade is lethality itself...