Lia and Zog, Bushwhacker Duo

Battle cry (When this creature attacks, other attacking creatures get +1/+0 until end of turn.)
Buddy System — Each other Elf is a Goblin
in adition to its other types and each other Goblin is an Elf in addition to its other
types. The same is true for Elf and Goblin spells and Elf and Goblin cards that aren't
on the battlefield.