You have the “Draca” card in your group, which has the alternative action. You reveal a card from your deck, which luckily has the help action available.
To use the action on the “Draca” card, you must choose help on your revealed card. You use the help from the revealed card and place the “Deer” faceup in the discard pile.
Additionally, you must place the top card of your deck in the facedown discard pile to meet the "discard 1 card" requirement. Do not place the “Draca” card in the discard pile.
Since you meet all the requirements of the action, you now receive your reward. You take a human card from the camp and add it faceup to your group.