This spell can't be countered.
Trample, haste
Delirium — : Return this card from your graveyard to the battlefield with a finality counter on it. Activate only if there are four or more card types among cards in your graveyard and only as a sorcery.
(20/09/2024)
Multiple finality counters on a single permanent are redundant.
(20/09/2024)
Finality counters aren't keyword counters, and a finality counter doesn't give any abilities to the permanent it's on. If that permanent loses its abilities and then would go to a graveyard, it will still be exiled instead.
(20/09/2024)
If a permanent with a finality counter on it would be put into a graveyard from the battlefield, exile it instead.
(20/09/2024)
Finality counters don't stop permanents from going to zones other than the graveyard from the battlefield. For example, if a permanent with a finality counter on it would be put into its owner's hand from the battlefield, it does so normally.
