Fafnir, the Greedy

At the beginning of your upkeep create X
colourless Gold tokens, where X is Fafnir, the
Greedy's power.
Whenever an artefact is put into a graveyard
from anywhere, Fafnir, the Greedy deals 1
damage to each opponent, then put a +1/+1
counter on Fafnir, the Greedy.
At the start of your end step, if you control 10 or
more artefacts, transform Fafnir, the Greedy.