Loki, God of Stories

As long as there are four or more lore counters
among Sagas you control, Loki, God of Stories 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.