4 tokens per turn cycle for
3W is not a terrible deal, especially if it makes it around the board more than once and you can reliably trigger it. I would not want to rely on opponents/temporary allies for the damage though.
I think a good home for it would be in some sort of WB lifegain/value tokens build like
Teysa Karlov perhaps. Pairing it with black just gives you a lot more consistency. You could trigger the response with something like
Erebos, God of the Dead or
Doom Whisperer, get some value off of
Vilis, Broker of Blood, then eat the tokens and get the sweet Teysa value with something like
Smothering Abomination (actually, not sure if the wording around "whenever you sacrifice" works with new Teysa come to think of it...),
Pitiless Plunderer, or
Zulaport Cutthroat.
If you aren't reliably pinging yourself and/or gaining the life back, I don't see it being worth inclusion in a deck as a four drop. I suppose it could live in a multicolor token swarm deck running multiple painlands,
Mana Confluence,
Ancient Tomb, etc. that already wants to be activating on-board mana sinks or playing instants.
Akim, the Soaring Wind,
Aryel, Knight of Windgrace, or
Atla Palani, Nest Tender maybe? Combos (...sort of?) with
Ephara, God of the Polis. I feel like
Ghave, Guru of Spores and
Breya, Etherium Shaper are too fast and combo-centered to care much about this card.
I suppose I am curious what you all think the ideal number of self-ping sources would be for this to be worth it. A token swarm take on
Kykar, Wind's Fury like mine would certainly like the effect if it resulted in
4W for 8+ tokens consistently, but that's a lot of work for some 1/1 ground creatures. I run some fetches, plus
Sunbaked Canyon and
Fiery Islet and three
talismans, and could reasonably slot some painlands back into the deck if I wanted to. There's also some good incidental lifegain effects in my maybeboard that I wouldn't mind including. Even with all of that work though, my hunch is that it would be too slow and incremental in a deck that likes to be very explosive.
EDIT: I should've read
@Mookie's post first, but instead ended up just restating his points about pairing with black and including it in a Teysa deck. Party foul on my part.