Oil counter

Oil counters are a counter type in Magic. They were introduced in Phyrexia: All Will Be One. 
==Description==
Oil counters are counters that can be used in various ways. They have no inherent meaning in the rules but are flavored to be connected to the Glistening oil of the Phyrexians. Some cards put oil counters on themselves and then use the counters for various effects. Other cards care about how many permanents you control with oil counters. Still, others move oil counters around.
They can mark several uses of ability, they can help you build up (both for scaling and threshold abilities), they can help you count down, or they can change the size of a creature or the power of an effect. The one thing R&D agreed on was that they wanted them to play nicely with proliferate, so having more should be better than having fewer. This means, for example, if they wanted a creature to only last three turns, they would start with three counters and count down, rather than counting up and having removal when they get to three counters. This way, using proliferate would grant you an extra turn with the creature.
==Trivia==
*In Magic Online, the counter is colored green as it's considered a positive effect and shares its icon with Collection, Descent, Fetch, Invitation, Mire, Slime and Soot counters.
*The Philadelphia 2023 Unknown Event introduced two oil counter keyword abilities:
**Oil Scavenge, on .
**Oil Sunburst, on .
==References==