Hobgoblin Bandit Leader 1RR
Creature - Goblin Rogue (Rare)
Other Goblins you control get +1/+1. R, T: Hobgoblin Bandit Leader deals damage equal to the amount of Goblins that entered the battlefield under your control this turn to any target.
Technically its powerful, except that it needs a mana and a tap, and only counts goblins that came into play that turn so you cant just continually progress and gain larger and larger burns. I really haven't seen any goblin token creation this set yet so its possible its better than I believe.
Could theoretically work with Krenko but that deck in either EDH or modern has better things to spend its mana on.
What makes this card really nice is that 3 toughness, which let's it survive from Pyroclasm-like cards.
It is still killed by Lightning Boltesque removals, but toughness 3 is still something nice to have.