For example, if you play a deck that includes black, white, and red spells, a land like Nomad Outpost is a good solution
The commander gets bigger whenever you play a non-creature spell, so if you chain some small spells together you quickly reach a point where he can be activated to pay for a big one
The negative counter doesnt do anything since its not a creature anymore, but it gets to untap and you can repeat this cycle indefinitely
Loads ranked cards from Time Spiral: Remastered
When paired with any 1-mana accelerant, say, Llanowar Elves, it becomes a massive threat that must be answered
The cherry on top is that the tokens have toxic, which can help you finish your opponents off before they can recover if they have a ton of life