Havengul Lich

Havengul Lich gains the activated abilities of the card as it existed in the graveyard while that card is still a spell on the stack.

Activated abilities contain a colon. They’re generally written “[Cost]: [Effect].” Some keywords are activated abilities and will have colons in their reminder text.

Havengul Lich’s ability changes the zone you are permitted to cast the card from, not the times you are permitted to cast it. You can cast a creature card that has been targeted by Havengul Lich from the graveyard, but unless it has flash, you can only do so if it’s your main phase, the stack is empty, and you have priority.