Ahead By A Century

When this enchantment enters the battlefield, you
may distribute 3 +1/+1 counters among any number
of target creatures you control. If you do, Sacrifice it.
Whenever an Artifact enters the battlefield under your control, put an advancement counter on this enchantment.
Sacrifice Ahead By A Century: Search your library
for a permanent with converted mana cost less
then the amount of advancement counters on this enchantment and put it onto the battlefield.