Varelli, Remorseful Architect

When Varelli enters the battlefield, draw
cards equal to the number of artifacts you
control.
{t}, Remove a -1/-1 counter from Varelli: Target artifact gains indestructible until end of turn.
Persist (When this permanent is put into a graveyard
from the battlefield, if it had no -1/-1 counters on it,
return it to the battlefield under its owner's control with
a -1/-1 counter on it.)