Master of Chancery

Purpose — At the beginning of your end step,
put an age counter on Master of Chancery, then
roll a d20 for each age counter on it. If you roll a
20 and Master of Chancery hasn't already
achieved its purpose, it achieves its purpose.
{t}: Draw a card. If Master of Chancery has
achieved its purpose, roll a d4 and draw that
many cards instead.