Welding Jar

Sacrifice Welding Jar: Regenerate target artifact.

Tormod's Crypt

{T}, Sacrifice Tormod's Crypt: Exile target player's graveyard.

Defender
Whenever Shield Sphere blocks, put a -0/-1 counter on it.

{T}, Sacrifice Mishra's Bauble: Look at the top card of target player's library. Draw a card at the beginning of the next turn's upkeep.

Indestructible (Effects that say "destroy" don't destroy this artifact.)

{T}, Sacrifice Dark Sphere: The next time a source of your choice would deal damage to you this turn, prevent half that damage, rounded down.

{T}, Sacrifice Ashnod's Coupon: Target player gets you target drink. You pay any costs for the drink.

First strike, menace, trample
Partner (You can have two commanders if both have partner.)