Nadier, Agent of the Duskenel is a uncommon Legendary Creature — Elf Warrior card from Commander Legends (CMR), collector number 135. Current market price: $0.31 (foil $0.33), TCGplayer market prices via Scryfall.
Whenever a token you control leaves the battlefield, put a +1/+1 counter on Nadier. When Nadier leaves the battlefield, create a number of 1/1 green Elf Warrior creature tokens equal to its power. Partner (You can have two commanders if both have partner.)