Eternal Priest Ayli

Whenever you attack, put a chain counter on target
creature and/or Planeswalker. Creatures and
planeswalkers with chain counters on them can't
attack or block, and their activated abilities can't be
activated.

{w}{u}{b}{r}{g}{c}: Exile Eternal Priest Ayli and all
creatures with chain counters on them. Create X
6/6 colorless Eldrazi creature tokens with
Annihilator 1 , where X is the number of creatures
exiled this way.