doing a ruling update this time since machine deck is on the rise at my locals recently.


Rulings taken from yugioh wikia and the link is here, i will just mention those important ones:

When "machina fortress" is destroyed by battle, its effect acticates and targets one card on your opponent's side of the field.



When "machina fortress" is targeted by an opponent's monster's effect, its effect which discards a card from your opponent's hand does not start a chain link.

doesnt start a chain, meaning no chariot or divine wrath.

If "machina fortress" is targeted by an opponent's Effect Monster's effect, then you check your opponent's hand and discard one card when the opponent's Effect Monster's effect resolves, before doing anything else.

Suppose "machina fortress" is targeted by an opponent's Effect Monster's effect and then "enemy controller" is Chained. After resolving the effect of "enemy controller", "machina fortress" is under your opponent's control, so when resolving the opponent's Effect Monster's effect "machina fortress" is no longer treated as "being targeted by an opponent's Effect Monster's effect". Thus, you do not apply the effect of "machina fortress" which discards one card from the opponent's hand.

cool...LOL.

The effect which Special Summons "machina fortress" by discarding monster(s) from the hand does not start a chain link.

Effects like "solemn judgement" and the effect of "thunder king rai-oh" may be activated if "machina fortress" is Special Summoning itself by its effect, to negate the Special Summon of "machina fortress".


When special summoning "machina fortress", discarding from your hand is a cost.

If "macro cosmos" is active, then you cannot discard "machina fortress" and other machine-type monsters to Special Summon that "machina fortress", since after being discarded "machina fortress" will be removed from play.


anyway, hope everyone gets a clearer picture after this and understand how this guy works. be clear of his strength and weakness and you will find a way to counter it. some examples:
1. a.o.j catastor.
2. icarus attack, even if he has gearframe equipped to it, he will die also.
3. rai-oh for obvious reasons stated above.
4. soul release etc, remove it from play before your opponent can special summon him out.
5. smashing ground!