Sunblade Elf

Creature — Elf Warrior1/1$0.13

This creature gets +1/+1 as long as you control a Plains. : Creatures you control get +1/+1 until end of turn.

Legal in Commander

Is

Commanders whose abilities work with this card and share its colors, from what the cards do.

Najeela, the Blade-BlossomSunblade Elf is a Warrior, which Najeela, the Blade-Blossom can use.
Voja, Jaws of the ConclaveSunblade Elf is an Elf, which Voja, Jaws of the Conclave can use.