It can also synergize well with Mikaeus, the Unhallowed, pinging itself down and creating an endless loop of death triggers
Curse of the Cabal (Black Counters Sorcery) Dont be fooled by the 10 mana cost on [c]Curse of the Cabal[/c], it uses time counters to reduce your mana cost
Stacking these up could be interesting, and it's not a must stop kind of effect that your opponents absolutely must get in the way of
If its an artifact, creature, or land card, you may put it onto the battlefield with a manifestation counter on it
So, having these cards legal would make it so no one would want to play for ante (especially considering the average price of a Vintage deck), meaning these cards would basically let you play a smaller deck since they would get removed and make you more likely to see your key cards
Normally, it would only go down to a cost of one, being mana even, but if you make it a Forest through Ashaya, Soul of the Wild and then add in a Blossoming Tortoise to the mix, you can get it down to free