The Chain Veil

Le Voile de Chaîne (The Chain Veil) (fr)

Legendary Artifact (CMC 4)
At the beginning of your end step, if you didn't activate a loyalty ability of a planeswalker this turn, you lose 2 life.
, : For each planeswalker you control, you may activate one of its loyalty abilities once this turn as though none of its loyalty abilities have been activated this turn.