When a Fortitude Digimon with digivolution cards is deleted, it comes straight back into play for free as just the top card. Single removal never quite finishes the job, which forces opponents to hold two answers or bounce it instead. It's mandatory, so it fires even on the rare turn replaying the naked body isn't what you wanted.
16-27-1. <Fortitude> is a keyword effect. When a Digimon with digivolution cards and this effect is deleted, you play this Digimon without paying the cost. 16-27-2. <Fortitude> is a trigger-type effect that triggers when a Digimon with digivolution cards and this effect is deleted. (For details, refer to 15-8-3 "Trigger-Type Effects") 16-27-3. The processing from <Fortitude> is mandatory.
Comprehensive Rules §16-27 — official rules page
From Bandai's card rulings. Each links to the card it was asked about.
If a Digimon card with the [X Antibody] is in this Digimon's digivolution cards, does this Digimon gain <Blocker> and <Fortitude>?
No, it doesn't.
Ruled Sep 6, 2024 · asked about Leomon (X Antibody) (P-139)
If I activate <Fortitude> before the <On Deletion> effect when this Digimon is deleted, can I still activate the <On Deletion> effect?
No, you can't activate it. If a card moves to an area other than the trash before a triggered <On Deletion> effect activates, that <On Deletion> effect won't activate.
Ruled Mar 28, 2024 · asked about HeavyLeomon (EX5-055)
29 cards carry this keyword:
Rule text © Bandai, quoted from the official Comprehensive Rules for reference. Combalo is not affiliated with Bandai.