Ripples of Potential Single-Sided You may play lands and

You may play lands and cast Bird spells from the top of your library

Each of X target creatures you control connive

double target creature's power until end of turn

Enchanted creature has shroud

That player sacrifices all permanents in the pile of their choice

Ripples of Potential Single-Sided You may play lands andProliferate, then choose any number of permanents you control that had a counter put on them this way. Those permanents phase out. (To proliferate, choose any number of permanents and or players, then give each another counter of each kind already there. Treat phased out permanents and anything attached to them as though they don't exist until their controller's next turn.)