Built to Smash
Instant (CMC 1)
Target attacking creature gets +3/+3 until end of turn. If it's an artifact creature, it gains trample until end of turn.
Decks with Built to Smash
[KLD] Kaladesh #108 (C)
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[KLR] Kaladesh Remastered #115 (C)
[MB1] Mystery Booster #878 (C)