It can take a while to get to 1000 time counters for each opponent to lose 1000 life, but if theres no artifact removal, it can be an eventual win condition
You need to get more from your cards, and your creatures in particular, than you can get if you have no way to interact with your graveyard
Gitaxian Raptor If proliferate decks become good enough they can churn out several counter bumps a turn, then this can potentially get in for a solid 3-4 damage a turn
For example, if a spell requires that you exile cards from your graveyard, you can exile cards from any graveyard
Its a silly array of abilities, and its hard not to love it
On its own, it's gorgeous, but with the rest of Destined Rivals, it truly stands out as a brilliant chase, one that deserves to be above the rest, even that SIR that's too expensive right now