Effect
If a monster you control battles an opponent's monster, during damage calculation: The ATK of each monster in that battle becomes equal to their current DEF, until the end of the Damage Step.
The effect "①: While this card is in the Monster Zone, activate during damage calculation when your monster battles an opponent's monster. Until the end of the Damage Step, the ATK of each battling monster becomes equal to its own DEF" is a Trigger Effect that must be activated.
This effect also activates if a monster you control other than "Gentian Bloom" battles an opponent's monster.
Continue with related public research
From this rulings page you can jump back into card data, set archives, tournament decks, banlist checks, and market movers.
Card database
Search Yu-Gi-Oh! cards, archetypes, stats, and printings.
Set archive
Navigate booster sets and inspect all cards in each release.
Tournament decks
Browse competitive decklists, player finishes, and archetype trends.
Banlist status
Check the current status of Yu-Gi-Oh! cards on the banlist.
Market movers
Track the top Yu-Gi-Oh! price gainers and momentum cards.