When a unit with 'when I move, draw 1 and discard 1' (like Traveling Merchant) moves to the battlefield, and you respond with Gust to remove it, does the draw/discard ability still resolve?

Ruling: Yes, the draw and discard ability still resolves. Once the Merchant moves and triggers its ability, the discard-draw effect goes on the chain and will resolve regardless of whether the Merchant is removed from the board.

Sequence:

• Merchant moves to battlefield and triggers "discard 1, draw 1" ability
• Ability goes on the chain
• Opponent can respond with Gust to remove the Merchant
• Gust resolves, removing the Merchant
• The discard/draw ability still resolves because it already triggered

Nuances:

• The Merchant is not considered an attacker until its trigger resolves, because showdown (and therefore combat) cannot start while items are on the chain
• This means you can use Gust with Cleave to remove the Merchant when it triggers its move ability, before it becomes an attacker