Marielle, Elven Warchief

Eminence — Whenever another nontoken Elf
enters the battlefield under your control, if
Marielle, Elven Warchief is in the command
zone or on the battlefield, create a 1/1 green Elf
creature token.
Whenever another Elf enters the battlefield
under your control, target Elf you control gets
+1/+1 until end of turn.