Bilious Slick

4,T: Search your library for a Frog creature card, put it onto the battlefield, then shuffle your library. T: Target creature becomes a 1/1 blue Frog and loses all abilities until end of turn.
Other Frogs you control have "T: Target Frog gets +2/+2 and is unblockable until end of turn. Frogs you control get +1/+1 until end of turn."