Ruby Medallion (CMM-405) - Commander Masters Foil Artist_Anastasia Balakchina then reveals the top card

then reveals the top card of their library

Whenever Cavern-Hoard Dragon deals combat damage to a player

[On Play] [When Digivolving] You may play 1 [Taiki Kudo]

The same is true for creature spells you control and creature cards you own that aren't on the battlefield

Ruby Medallion (CMM-405) - Commander Masters Foil Artist_Anastasia Balakchina then reveals the top cardCasting Cost Card TypeArtifact RarityRare ArtistDaniel Ljunggren Legalities NOT LEGAL Standard NOT LEGAL Future NOT LEGAL Historic NOT LEGAL Gladiator NOT LEGAL Pioneer NOT LEGAL Explorer NOT LEGAL Modern LEGAL Legacy NOT LEGAL Pauper LEGAL Vintage NOT LEGAL Penny LEGAL Commander LEGAL Oathbreaker NOT LEGAL Brawl NOT LEGAL Historic Brawl NOT LEGAL Alchemy NOT LEGAL Pauper Commander LEGAL Duel NOT LEGAL Oldschool LEGAL Premodern LEGAL Predh Red spells