A number of spells can only be cast onto a Free Cell. Attempting to cast the spell into an occupied Cell will not be possible (this can be because another creature is standing there, or an inanimate object, or simply no ground to place anything onto). This type of restriction is usually required by spells which create objects on the field.
|Cra||Incandescent Beacon||Place Beacon|
|Seismic Beacon||Place Beacon|
|Windy Beacon||Place Beacon|