Chaos Emerald - Powerful Red

When this artifact enters the battlefield, choose one -
. target creature gets +2/+2
. target planeswalker gets 2 loyalty counters

Equipped Creature has +3/+0 and Trample.
Equipped Creature gets First Strike if you control 3
or more other emeralds.

Equip {4} ({4}: Attach to target creature you control. Equip only as a sorcery.)