Trusty Shellback

Double Strike
If mana from a Gold token was spent to cast this
spell, it enters the battlefield with a +1/+1 counter
on it.
At the end of combat on your turn, if Trusty Shellback dealt 6 or more damage, draw a card.
Sacrifice 2 Artifacts: Trusty Shellback gains
Hexproof until end of turn. Tap it.