Kelsien, the Plague 11 (Commander 2020)

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.

NM - $5.50
LP - $4.40
MP - $3.30
HP - $2.20
DMG - $2.20