Temur Sabertooth + Crystalline Crawler + Resourceful Defense
Temur Sabertooth
Crystalline Crawler
Resourceful Defense
Infinite +1/+1 counters on permanents you controlInfinite blinkingInfinite colored manaInfinite creature ETBInfinite creature LTBInfinite storm count
How it works
Activate Temur Sabertooth by paying 1, returning a creature from the battlefield to your hand and giving Temur Sabertooth indestructible until end of turn.
When that creature leaves the battlefield, Resourceful Defense triggers, putting a +1/+1 counter onto Crystalline Crawler for each +1/+1 counter that was on that creature.
Activate Crystalline Crawler's mana ability repeatedly by removing all +1/+1 counters from it, adding one mana for each counter.
Cast the creature you returned by paying its mana cost, causing it to enter the battlefield with at least two more +1/+1 counters than the amount of mana spent to cast it.