Soulsilver Graft

Enchant creature
When Soulsilver Graft enters the battlefield and
at the beginning of your upkeep, you may exile
an artifact you control.
Enchanted creature has all activated non-equip
abilities of artifacts cards exiled with Soulsilver
Graft and gets +X/+X, where X is the combined
mana value of artifact cards exiled with Soulsilver
Graft.