You'll want to deal combat damage to as many of your opponents as you can in each combat, so creatures with shadow come in handy here
Alternatively, blinking the card will remove the counters, which can be another good reason to do so
I think Endless One could be fine in a deck that has a focus on the +1/+1 counters on your creatures with cards like Avatar of the Resolute, but as a big payoff spell, the other options are miles better
The MTG Mystery Booster card list is an exciting resource for Magic: The Gathering enthusiasts and collectors
This BGS 9.5-graded Alpha Copy Artifact sold for an impressive $29,400 in 2023, a price that reflects both its playability and extreme rarity
Phyrexian Arena AND Black Market Connections I know