Built to Smash | Instant | | Target attacking creature gets +3/+3 until end of turn. If it's an artifact creature, it gains trample until end of turn. | Svetlin Velinov
Chandra's Pyrohelix | Instant | | Chandra's Pyrohelix deals 2 damage divided as you choose among one or two targets. | Kieran Yanner
Welding Sparks | Instant | | Welding Sparks deals X damage to target creature, where X is 3 plus the number of artifacts you control. | Raymond Swanland