Thanks for the feedback.
If you put a yellow card on your opponent, you do not cause damage, but the goblin will draw the next card, if you put a yellow card on yourself, you continue to draw cards.
Also, all items are important for building a winning strategy: for example, if you use "hand", you will find out which card is excluded from the deck and you already have more information. And if you know or guess which card will be next, you can use "yin yang" to change the card card from yellow to purple and vice versa.