Professor Elm's Lecture (213/214) [Sun & Moon: Lost Thunder]Set: Sun & Moon: Lost Thunder Type: Supporter Rarity: Ultra Rare

Set: Platinum: Base Set Type: Lightning Rarity: Ultra Rare Retreat cost: Colorless

Set: Sun & Moon: Crimson Invasion Type: Dragon Rarity: Promo Retreat cost: Colorless

Set: Base Set Shadowless Unlimited Type: Colorless Rarity: Holo Rare Retreat cost: Colorless

except from the Extra Monster Zone

if a card has been put into your hero's soul this turn

Set: Black & White: Boundaries Crossed Type: Water Rarity: Promo Retreat cost: Colorless

Set: EX: Dragon Frontiers Type: Lightning Rarity: Ultra Rare Retreat cost: Colorless

(This card was awarded as a Prize for the October 2020 Yu-Gi-Oh

Set: EX: Unseen Forces Type: Fire Rarity: Rare Retreat cost: Colorless

Set: Skyridge Type: Darkness Rarity: Common Retreat cost: Colorless

if you have no cards in your deck

Set: Welcome to Rathe Edition: Alpha Print Finish: Rainbow Foil Type: Defense Reaction Rarity: Rare Class: Guardian Cost: 2 As an additional cost to play Staunch Response