2, t: move a counter from one permanent onto another. if the second permanent refers to any kind of counter, the moved counter becomes one of those counters. otherwise, it becomes a +1/+1 counter.

3, t: put a +1/+1 counter on target creature.

4, t: proliferate. (you choose any number of permanents and/or players with counters on them, then give each another counter of a kind already there.)