Coalossal (SWSH024) (Staff Prerelease Promo) [Sword & Shield: Black Star Promos] World Championships 2019 [On Play][When Digivolving] You may

[On Play][When Digivolving] You may play 1 purple level 4 or lower Digimon card or 1 level 4 or lower Digimon card with [Xros Heart] in its traits from your trash without paying the cost

and attach the revealed card to the Summoned monster

You can use this effect during either player's turn

and can only activate them while "Blue-Eyes White Dragon" is on your field or in your GY

Coalossal (SWSH024) (Staff Prerelease Promo) [Sword & Shield: Black Star Promos] World Championships 2019 [On Play][When Digivolving] You maySet: Sword & Shield: Black Star Promos Type: Fighting Rarity: Promo Retreat cost: Colorless,Colorless,Colorless,Colorless