KLD: Built to Smash, Instant R Target attacking creature gets +3/+3 until end of turn. If it's an artifact creature, it gains trample until end of turn.

Built to Smash

Target attacking creature gets +3/+3 until end of turn. If it's an artifact creature, it gains trample until end of turn.

9/20/2016 An artifact creature gains trample in addition to getting +3/+3, not instead of it.