I used this card's ＜Main Timing＞ effect to to give 1 of my Digimon with [Garurumon] "＜On Deletion＞ Play this card without paying the cost." What happens to the effect if the target Digimon later becomes a Digimon without [Garururmon] by digivolving or ＜De Digivolve＞?

Even if the Digimon becomes a Digimon without [Garurumon], as long as the conditions were met at the time of activation for this card's effect, the effect will persist until the end of your opponent's turn.

Lament of Friendship rulings (ST16-15)

1 official ruling from Bandai, last ruled Mar 28, 2024. Straight answers to how this card actually resolves.

Effect: While you have a Tamer with [Matt Ishida] in its name, you can ignore this card's color requirements. [Main] Return 1 Digimon card from your trash to your hand. Then, 1 of your Digimon with [Garurumon] in its name gains "[On Deletion] Play this card without paying its cost." until the end of your opponent's turn.
Security effect: [Security] Activate this card's [Main] effects.

Official Q&A

I used this card's ＜Main Timing＞ effect to to give 1 of my Digimon with [Garurumon] "＜On Deletion＞ Play this card without paying the cost." What happens to the effect if the target Digimon later becomes a Digimon without [Garururmon] by digivolving or ＜De Digivolve＞?
Even if the Digimon becomes a Digimon without [Garurumon], as long as the conditions were met at the time of activation for this card's effect, the effect will persist until the end of your opponent's turn.
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.

Lament of Friendship rulings (ST16-15)

1 official ruling from Bandai, last ruled Mar 28, 2024. Straight answers to how this card actually resolves.

Effect: While you have a Tamer with [Matt Ishida] in its name, you can ignore this card's color requirements. [Main] Return 1 Digimon card from your trash to your hand. Then, 1 of your Digimon with [Garurumon] in its name gains "[On Deletion] Play this card without paying its cost." until the end of your opponent's turn.
Security effect: [Security] Activate this card's [Main] effects.

Official Q&A

I used this card's ＜Main Timing＞ effect to to give 1 of my Digimon with [Garurumon] "＜On Deletion＞ Play this card without paying the cost." What happens to the effect if the target Digimon later becomes a Digimon without [Garururmon] by digivolving or ＜De Digivolve＞?
Even if the Digimon becomes a Digimon without [Garurumon], as long as the conditions were met at the time of activation for this card's effect, the effect will persist until the end of your opponent's turn.
Ruled Mar 28, 2024

Got a line that uses Lament of Friendship? Map it in the builder and share it with a link.