Madlands

Cards are discarded in a Magic game only from a player’s hand. Effects that put cards into a player’s graveyard from anywhere else do not cause those cards to be discarded.

Madness works independently of why you’re discarding the card. You could discard it to pay a cost, because a spell or ability tells you to, or because you have too many cards in your hand during your cleanup step. You can’t discard a card with madness just because you want to, though.

If you discard a card with madness to pay the cost of a spell or activated ability, that card’s madness triggered ability will resolve before the spell or ability the discard paid for.