Demon Lords' Banquet ~Walpurgis~ (UEPR/TSK-1-095) - UE20BT That Time I Got Reincarnated as a Slime Release Event Cards

[Activate: Main] (Switch to Resting) (Place 1 Card From Hand Into Sideline) Reveal the top card of your deck and add it to your hand. If you reveal a [Demon Lord] affinity card with this ability, this site gains Green energy generation until the end of the turn.