They get uncastable giant creatures out of our hand and into the graveyard, they refill our hand with fresh gas to play, and of course, they trigger Sefris (so long as we discard at least one creature)
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The vote comes down to two different outcomes
A player commits a crime as they cast a spell, activate an ability, or put a triggered ability on the stack that targets at least one opponent, at least one permanent, spell, or ability an opponent controls, and/or at least one card in an opponent's graveyard
An example can be found with the featured card above
Delirium abilities are active if you have four or more card types among the cards in your graveyard