Vanquish Soul Dr. Mad Love

If this card is Normal or Special Summoned: You can add 1 "Vanquish Soul" Spell/Trap from your Deck to your hand. (Quick Effect): You can activate 1 of these effects, by revealing monster(s) in your hand with the listed Attribute(s);
● DARK: 1 face-up monster your opponent controls loses 500 ATK/DEF.
● DARK & EARTH: Return the 1 monster with the lowest DEF on the field to the hand (your choice, if tied).
You can only use each effect of "Vanquish Soul Dr. Mad Love" once per turn, and cannot activate more than 1 in the same Chain.