When resolving the effects of a card, follow the instructions as much as possible. If you are unable to fully resolve the effects, do as much as you can and then proceed to the next effect.
Some effects require you to pay a cost in order to resolve it. If you can pay the cost, you must. However, if you cannot pay the cost of resolving an effect, do not resolve that effect.
You may still activate a card, even if you are unable to pay the cost of resolving its effect. This removes 1 Supply from the card you activated as normal.