Mogg Rouser

Whenever a Goblin enters the battlefield under
your control, exile the top card of your library. If
the exiled card shares a color with Mogg Rouser,
target Goblin you control gets +1/+0 until end of
turn.
{r}, Sacrifice a Goblin with power 4 or greater:
Put all cards exiled by Mogg Rouser into their
owners' hands.