Reiterate with buyback by paying ({4} magic symbol) ({R} magic symbol) ({R} magic symbol) , creating a copy of
Biogenic Upgrade targeting
Crystalline Crawler and returning
Reiterate to your hand.
Resolve the copy of
Biogenic Upgrade, putting three +1/+1 counters on
Crystalline Crawler and then doubling the number of +1/+1 counters on
Crystalline Crawler.
Activate
Crystalline Crawler's first ability six times by removing six +1/+1 counters from it, adding ({4} magic symbol) ({R} magic symbol) ({R} magic symbol) .
Repeat from step 2.
Once you have infinite mana, you may instead target other creatures using