Morgana

+1: Put a 1/1 Black and Blue elf creature toklen into play which has "{t} add {b}/{bl} to your mana pool"
-2: Put a +1/+1 counter on each elf your control
-6: Put a 1/1 Black and Blue elf creature toklen into play which has "{t} add {b}/{bl} to your mana pool" for each elf your control