Commander 2020

When Jirina Kudro enters, create a 1/1 white Human Soldier creature token for each time you've cast a commander from the command zone this game. Other Humans you control get +2/+0.

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.

Partner with Yannik, Scavenging Sentinel (When this creature enters, target player may put Yannik into their hand from their library, then shuffle.) Menace Whenever another creature you control leaves the battlefield, if it had one or more counters on it, you draw a card and you lose 1 life.

Partner with Trynn, Champion of Freedom (When this creature enters, target player may put Trynn into their hand from their library, then shuffle.) Menace Sacrifice a Human: Put a +1/+1 counter on Silvar. It gains indestructible until end of turn.

Partner with Silvar, Devourer of the Free (When this creature enters, target player may put Silvar into their hand from their library, then shuffle.) At the beginning of your end step, if you attacked this turn, create a 1/1 white Human Soldier creature token.