The Stars Are RightDuring your summoning phase, you may "summon" a Munchkin Pawn by discarding any one card. This is considered a summoning; thus, you may not summon anything else on this turn. You may only have one Pawn in front of you at a time, though you may summon multiple Pawns over the course of a game. The Pawn is not worth any points. When summoning a Great Old One, treat the Pawn as a Lesser Servitor that reduces the Great Old One's cost by one tile of any type.
(It's a pretty powerful ability, but I think the need to effectively "skip a turn" makes it balanced.)