Proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.) Draw a card.

Put a +1/+1 counter on target creature, then proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)

Destroy target creature, then proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)

Whenever you cast an enchantment spell, you get an experience counter. {1}{W}{B}: Create a white and black Spirit enchantment creature token. It has "This creature's power and toughness are each equal to the number of experience counters you have."

Whenever a creature you control with power 2 or less enters, you get an experience counter. At the beginning of combat on your turn, put X +1/+1 counters on another target creature you control, where X is the number of experience counters you have.

Double strike, vigilance Whenever you cast a creature spell with mana value 5 or greater, you get an experience counter. Kalemne gets +1/+1 for each experience counter you have.

Vigilance, haste Kelsien gets +1/+1 for each experience counter you have. {T}: Kelsien deals 1 damage to target creature you don't control. When that creature dies this turn, you get an experience counter.

Whenever another creature you control dies, you get an experience counter. At the beginning of your end step, choose target creature card in your graveyard. If that card's mana value is less than or equal to the number of experience counters you have, return it to the battlefield. Otherwise, put it into your hand.

Minthara has ward {X}, where X is the number of experience counters you have. At the beginning of your end step, if a permanent you controlled left the battlefield this turn, you get an experience counter. Creatures you control get +1/+0 for each experience counter you have.

Flying, vigilance, deathtouch, lifelink At the beginning of your end step, proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)

When this creature enters, proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)

Landfall — Whenever a land you control enters, proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)

Whenever you cast a noncreature spell, proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)

Infect (This creature deals damage to creatures in the form of -1/-1 counters and to players in the form of poison counters.) When this creature enters, each player gets a poison counter.

When this creature dies, proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)

{T}, Sacrifice a creature: Proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)