Rydesdale, the Rider's Boon

Rydesdale, the Rider's Boon enters the battlefield with four +1/+1 counters on it.
When it attacks, put an artifact or enchantment an opponent controls back to to their hand and it deals 3 damage to that opponent. put a +1/+1 counter on Rydesdale, the Rider's Boon.
Partner (You can have two commanders if they both have partner.)