A player can target anyone with a hand with blaze. The target then shows any hand card of theirs. The player can then discard any hand card of the same suit to damage them one with fire.
The target selects the card from their hand to show, then puts it back into their hand.
Everyone can see the entire card, not just the suit.
After seeing the card, the player decides whether to discard a matching card to deal damage.
A player can target themselves with Blaze, but only if they have another card to discard.