Diamond Knight

Artifact Creature — Knight - (uncommon)

Vigilance (Attacking doesn't cause this creature to tap.)
As Diamond Knight enters the battlefield, choose a color.
Whenever you cast a spell of the chosen color, put a +1/+1 counter on Diamond Knight.

Price

manapool 0.15

tcgplayer 0.18

cardmarket 0.12

cardkingdom 0.35

cardsphere 0.23