[WHO] implemented Disguise ability (new face down type, ability and token image, #10653)

Mage/src/main/java/mage/abilities/AbilityImpl.java

@@ -429,6 +429,7 @@ public abstract class AbilityImpl implements Ability {
                 case BESTOW:
                 case MORPH:
                 case MEGAMORPH:
+                case DISGUISE:
                     // from Snapcaster Mage:
                     // If you cast a spell from a graveyard using its flashback ability, you can't pay other alternative costs
                     // (such as that of Foil). (2018-12-07)