4 official rulings from Bandai, last ruled Mar 28, 2024. Straight answers to how this card actually resolves.
How does this card’s “Players can’t reduce play costs” effect work, exactly?
It prevents effects that reduce play costs. Even if you or your opponent activates an effect that reduces play costs, the cost that is paid cannot actually be reduced. Players must pay the full play cost printed on cards.
Ruled Mar 28, 2024
If this Digimon is in play, can I activate an effect that reads, “play ...without paying its memory cost”?
Yes. Effects that play cards without paying their memory costs are skipping the costs entirely, not reducing them.
Ruled Mar 28, 2024
Can the play cost of a Digimon with the [Royal Knight] be reduced due to the <Your Turn> effect of my opponent's [BT13-007]/[King Drasil_7D6] if this Digimon is in play?
No, they can't be reduced. This card's effect does not target Digimon, so even if your opponent's [BT13-007]/[King Drasil_7D6] is in the breeding area, its effect to reduce play costs can't be activated.
Ruled Mar 28, 2024
When I have this Digimon, can my opponent no longer use [BT14-046]/[Togemon]'s <Your Turn> effect or inherited effect to reduce the play cost of green Tamer cards?
That's correct. Such effects can no longer reduce play costs. This card's effect also prevents play cost-reducing effects from activating when Tamer cards are played.
Ruled Mar 28, 2024
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Questions and answers are Bandai's official rulings, collected and translated by the DigimonCardGame Wiki community and reused here under CC BY-SA. Card names and card text are © their respective publishers; Combalo is not affiliated with Bandai.