He starts as just a 0/1 with a +1/+1 counter
Given how cheap the initial cost is and the big impact it has, leveling up this enchantment doesn't need to be a priority, but if you have a few creatures on the battlefield and want to let your hand build back up, you can focus on pumping mana into upgrades
This leaves literal thousands of creatures to go through and whittle down
In addition to this, as a Chord of Calling player, Haywire Mite provides the cheapest possible Chord target for killing artifacts and enchantments
But let's not daydream on future White card draw, let's talk about the card we just got
This makes Abandoned Air Temple a solid upgrade on a land that can break ties, stalls and nearly counts as a win condition with little other support