Flying, vigilance, deathtouch, lifelinkAt 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.)
: Choose target artifact a player controls and target artifact card in that player's graveyard. If both targets are still legal as this ability resolves, that player simultaneously sacrifices the artifact and returns the artifact card to the battlefield.
Reyhan, Last of the Abzan enters with three +1/+1 counters on it.Whenever a creature you control dies or is put into the command zone, if it had one or more +1/+1 counters on it, you may put that many +1/+1 counters on target creature.Partner (You can have two commanders if both have partner.)
Double strike, vigilanceWhenever you cast a creature spell with mana value 5 or greater, you get an experience counter.Kalemne, Disciple of Iroas gets +1/+1 for each experience counter you have.
TrampleKalonian Hydra enters with four +1/+1 counters on it.Whenever Kalonian Hydra attacks, double the number of +1/+1 counters on each creature you control.
