They can temporarily keep benched Pokemon safe from attacks, which is useful if you're in the midst of building your Blastoise ex
It tries to simplify the boardstate incredibly quick through the use of cards like Time Seal, Trap Dustshoot, and Dragged Down to the Grave so that few cards are actually lost once the Sanctity is played
Of all the keywords to have, indestructible is probably the best one
All 6 leaders ranked with key shifts, OP-17 notes
Defend the Rider Despite how it sounds, Defend the Rider is excellent for protecting your lands, enchantments, artifacts and planeswalkers too
Naturally, it brings with it a pretty hefty price tag for a new card at $14