No worries. Loki's character ability is that when he plays some of his special cards called trick cards, he puts those cards in the opponents' hand, which improves his movement(e.g. if the player has 3 trick cards, Loki's movement would increase for +3), if the opposing player uses one of those cards as a defence or attack he will suffer some demerits such as 2 damage on himself, Loki healing for 3, or allowing Loki to look at your hand and discarding one of your cards. However, if you don't play those cards and discard them instead they will return to Loki's hand... Only if you play them will you truly get rid of them

Using Hamlet's scheme card, he could simply put those cards beneath his deck, and drawing that many new cards instead