Weld Wyrms

Trample
When Weld Wyrms enters the battlefield,
destroy up to one target artifact.
{r/g}{r/g}, Sacrifice an artifact: Destroy target
artifact.
{t}, Sacrifice an artifact: Put two +1/+1 counters
on Weld Wyrms.
Artwork/creature source:
https://www.youtube.com/watch?v=rfLkSHXEtTk