5 facts about HoM&M III you probably don't know (Part 2)

These facts are for SoD, but some of them are actual in HotA

If you end the turn in allied castle (different flag) and AI hero attacks you, allied troops in town garrison will be placed in your hero unit slots and will stay on your side forever
If you win the fight with only summoned elementals and resurrected creatures without Earth Magic secondary skill your hero will have no troops (7 empty unit slots)
If you devide some units (Dwarves for example) into stacks with single units you can save some amount of gold while upgrading them in Hill Fort
If you place forcefield on downbridge entrance during siege enemy/ally troops will be able to go through the spell obstacle
Magic Mirror gives to unit an immunity to spell "Hypnotize", however natural Magic Mirror of Fairie Dragons doesn't have such immunity, and they are the only way to reflect Hypnotize spell