Im sure that each ability listed could be especially good in specific deck strategies, and him being creature-type Human only adds to the power level, but you can also just play any deck that wants to cast a lot of spellsbe it creature spells or otherwise
For starters, it can easily dish out +1/+1 counters, which is the main theme of the deck
The early turns need to be used ramping up to bigger plays, which gives stronger decks with faster mana an opportunity to get under you and execute a quick infinite combo win
This playstyle wont be popular with opponents, but they likely wont see it coming until youre getting ahead in the game
Equipped with a unique smart click-lock mechanism, the token box keeps everything securely stored
So, for example, [c]Teferi, Who Slows the Sunset[/c] will enter with four loyalty counters