Up to three creatures with MV 3 or less has been done at this mana cost, but putting a +1/+1 counter on each of them is pretty huge all said
(2) If you Special Summon a non-FIRE HERO Fusion Monster(s): You can Special Summon this card from your GY (if it was there when the monster was Summoned) or hand (even if not), but banish it when it leaves the field
Rare silver trophy Pikachu card from Pokmon TCGs second-ever tournament sells for $444,000 at auction Gem Mint quality is highest rated of four catalogued copies of the Pikachu No.2 Silver Trophy
Cycling (, Discard this card: Draw a card.) Legendary Artifact Pir, Imaginative Rascal Partner with Toothy, Imaginary Friend (When this creature enters, target player may put Toothy into their hand from their library, then shuffle.) If one or more counters would be put on a permanent your team controls, that many plus one of each of those kinds of counters are put on that permanent instead
You can see the huge upside if you exile and create tokens of assassin cards like Mari, the Killing Quill and Aya of Alexandria