Glistening Sphere
Artifact
When this artifact enters, proliferate.
: Add one mana of any color.
Corrupted — : Add three mana of any one color. Activate only if an opponent has three or more poison counters.
Legal in
Legacy, Vintage, Commander
Rulings (6)
An ability that triggers "Whenever you proliferate" triggers even if you chose no permanents or players while doing so.
2023-02-04
If a permanent ever has both +1/+1 counters and -1/-1 counters on it at the same time, they're removed in pairs as a state-based action so that the permanent has only one of those kinds of counters on it.
2023-02-04
Players can respond to a spell or ability whose effect includes proliferating. Once that spell or ability starts to resolve, however, and its controller chooses which permanents and players will get new counters, it's too late for anyone to respond.
2023-02-04
If a player or permanent has more than one kind of counter on it, and you choose for it to get additional counters, it must get one of each kind of counter it already has. You can't have it get just one kind of counter it already has and not the others.
2023-02-04