To start things properly, there is a keyword in a game of Magic: the Gathering, fairly new one if I'm not mistaken, called Madness.
A card with Madness, when discarded from hand, may be immediately played for it Madness cost (the keyword is printed with the cost attached to it).
Do you catch my drift? Imagine how Noldor would enjoy this kind of keyword. Some regular decks might enjoy it as well.
I would adapt it into rules as something like:
Madness X - when a card with Madness keyword is discarded from a player's hand, that player may immediately play that card as if it was in his hand, paying it's Madness cost (X). Resource match is required to pay Madness cost, if applicible.
And let me smash you with a 2 minutes proof of concept:

