Can Jinx Demolitionist be played if you don't have 2 cards in hand to discard, and does this apply to other similar effects?

Ruling: You can play Jinx Demolitionist even with 0 or 1 cards in hand because "discard 2" is an effect, not a cost. This principle applies to other non-targeting effects like Cull of the Weak.

Nuances:

• If a card requires a target and you cannot satisfy the targeting requirement, then you cannot play it (e.g., Charm cannot be played if the opponent has no units)
• Effects that don't target can resolve even if they cannot be fully satisfied