United Front

Humans you control have +1/+1 if you control
an elf and +1/+1 if you control a dwarf.
Elves you control have +1/+1 if you control
a human and +1/+1 if you control a dwarf.
Dwarves you control have +1/+1 if you control
an elf and +1/+1 if you control a human.