Have

Seat of the Synod

Sacrifice this artifact: Regenerate target artifact.

Your life total can't change. (You can't gain or lose life. You can't pay any amount of life except 0.)

Affinity for artifacts (This spell costs {1} less to cast for each artifact you control.)

{T}: Put a +1/+1 counter on each artifact creature you control.

{T}: Add {U} for each artifact you control.

Master of Etherium's power and toughness are each equal to the number of artifacts you control.
Other artifact creatures you control get +1/+1.

You have no maximum hand size.
{T}: Add {C}.

Defender
Whenever this creature blocks, put a -0/-1 counter on it.

Whenever an opponent casts a spell, you may draw a card unless that player pays {1}.