In practice, dealing damage "from hand" instead of "from board" isn't actually a very meaningful distinction. I only noticed it because it avoids Pitfall Trap, which is supposed to deny any deploy abilities a card might have when it is played on *the board*.
But since the damage happens from hand, Pitfall Trap will only trigger after the damage has been dealt.
But since the damage happens from hand, Pitfall Trap will only trigger after the damage has been dealt.