Temple of a Thousand Mercies (BSS06-097) [Generational Link]

[LV1-LV2] During Opponent's Turn

When your opponent uses one of their effects to draw a card, place a core from the void onto this nexus.

[LV2] During Your Attack Step

When one of your War God or Golem spirits reduces your opponent's life, discard the top four cards of their deck.