Dakka Forge

Dakka Forge enters the battlefield tapped.
Dakka Forge enters the battlefield with 5 +1/+1 counters on it.
Whenever you are dealt combat damage, remove
a +1/+1 counter from Dakka Forge.
If at any point Dakka Forge would have no +1/+1 counters on it, sacrifice it.
Pay 4 dakka counters : Search your library for an artifact card with converted mana cost 5 or less,
reveal it, and put it into your hand, then shuffle
your library.