I was looking for some combination that would abuse the self-response mechanism I didn't think existed, and saw someone mention this in the forums. Check it out:

I have Drakenhof Castle in play: "Action: Move a non-Undead unit in any player's discard pile to the bottom of his deck to cancel the next 2 damage assigned to target undead unit."

My opponent plays "Reclaiming the Fallen": "Choose one of your zones. Put into play all units in your discard pile into that zone. Sacrifice those units at the end of the phase.".

Let's pretend I have one Undead unit in play. I can respond to Reclaiming the Fallen with many instances of Drakenhof Castle's ability, right? So, if my opponent had 8 dwarf units in his discard, I could trigger the Castle 8 times, protecting my one undead unit from 16 points of damage? I could see someone argue that I would need to have 8 Undead units to use this action 8 times, but I'm not 100% sure that's correct. If I cancel "the next" 2 damage, then am assigned 4 damage, 2 of those cancel. So in that world, "the next" 2 damage would be the uncancelled 2, which I could negate with another use of the Castle, no?

Now, until this point I thought that responding to your own stuff was impossible, but apparently it's not. So it could go like this:

Opponent: Reclaiming the Fallen.

Me: I respond with the Castle action

Opponent: pass

Me: I respond to myself with the Castle action again.

(... 6 more times...)

Opponent: I hate you and I am not playing this again with you, you stupid rules lawyer.

You could do it, yes. So there'd be no unit left in your opponent's discard pile when Reclaiming resolves. You'd only need one undead unit under your control.

No matter how often you use it though, it'll only cancel the next two damage. If it has done that, you could then use the action again to cancel the next two, but if the unit is assigned four, it'll take two. These have already been assigned, so using the action before they are applied would be too late.

You can counter Reclaiming already this way with Mannfred von Carstein, provided you have enough cards in hand to discard.

Ok thanks.

Poor Vitamin T, his sensible Carstein at least needed cards in hand. This Castle business is strictly better. Ugh, if I try this in my play group I fear they'll just tell me they hate me and claim I am making up rules.

Good news to hear that destruction decks will soon beat RTF dwarves easily!

doesnt it say in the timing structure both players have to pass in a row for it to move onto the next step