Thank you.
Your card is pretty nice. Few quibbles.
Templating should be "Whenever a token creature you control", since the ability is triggered.
Second quibble is that attacking token is much easier than nontoken. Especially, since this can generate it's own token. In commander, you could generate a bunch of these (40 life limit) and attack and whatever.
Third is that so far, only Vampires could pay life for effect, at least in Pioneer (in Modern there is the Planar Chaos' Crovax, Planar Chaos is the edition they decided to break everything for ****s and giggles). It's a minor one, but good to keep in mind.
Look at this search:
https://scryfall.com/search?q=o%3Apa...order=released
Only ones that pay life for effect is Adanto Vanguard and Glorifier of Dusk.
Yeah, went through few iteration with Discord, they thought the Eminence was bad. I'm not a commander player, I thought it was decent.
Eh, it's more of a demonstration. But in flavor would be he gets other humans to investigate for him (nontokens), and the more artifact the purges, the more followers (tokens) he gets.
I didn't count enemy artifacts, because I didn't want to make this an anti-artifact deck.
Bah. Had a fun idea about Planeswalker Auras