Coloza, Wing of Mystery

Flying
Sorrow - At the beginning of each end step, if
you lost life or a card was put into your
graveyard from anywhere other than the stack
this turn, investigate, then scry X, where X is
the number of Clues you control.
Activated abilities of Clues you activate cost {x} less to activate, where X is the number of
Clues you control.