The Watcher

As long as there are four or more lore
counters among Sagas you control, The Watcher
has hexproof and indestructible.
Whenever the final chapter ability of a Saga
you control resolves, reveal cards from the
top of your library until you reveal a Saga
card. Put that card onto the battlefield and the
rest on the bottom of your library in a random
order. This ability triggers only once each turn.