Aren't We Besties? Rimuru (TSK/S82-E054 C) [That Time I Got Reincarnated as a Slime Vol.2]

[CONT] All of your other "Demon Continent" characters get +500 power. [AUTO] [Put 1 card from your hand into your waiting room] This ability activates up to 1 time per turn. When your other "Of Course We're Besties! Milim" is placed on the stage from your hand, you may pay the cost. If you do, look at up to 4 cards from the top of your deck, choose up to 1 "Demon Continent" character from among them, reveal it to your opponent, put it into your hand, and put the rest into your waiting room.