Blastcone Fae

811.1.d.2. If a hidden spell or a play effect of a hidden permanent chooses any targets, those targets must be chosen from among options at that battlefield, unless the ability explicitly restricts targeting in a way that makes this impossible. Example: Blastcone Fae is a unit with Hidden and "When you play me, give a unit -2 [M] this turn, to a minimum of 1 [M]." Because this is a play effect, its target must be chosen from among units at the same battlefield if Blastcone Fae was played from Hidden. Example: Tideturner is a unit with Hidden and "When you play me, you may choose a unit you control at another location. Move me to its location and it to my original location." Because its play effect has a targeting restriction that can never be fulfilled by a unit at its battlefield, its target may be chosen freely from among the available options.