Astral Paradoxes

Cumulative upkeep {1}
Whenever the effect of a permanent causes
a player to discard any number of cards, that
permanent's controller sacrifices it.
Whenever a player controls more than one non-
basic permanent with the same name, they
sacrifice one of those permanents. If a Bag of
Holding is sacrificed this way, each player
sacrifices all non-land permanents they control.