The effect of Lightsworn Sanctuary is here:
Once per turn: You can send 1 “Lightsworn” monster from your hand to the Graveyard, then target 1 other “Lightsworn” monster in your Graveyard; add it to your hand. Each time a card(s) is sent from your Deck to the Graveyard, place 1 Shine Counter on this card. If a “Lightsworn” card(s) you control would be destroyed by a card effect, you can remove 2 Shine Counters from your side of the field for each of those “Lightsworn” card(s) instead.
Source: https://yugiohblog.konami.com/articles/?p=6233
