-If the creature loses "unblockability" the opponent can assign a blocker after the Trepanation Blade resolves? (I think the main question here would be whenTrepanation Blade resolves).
-If I used the Forecast option of Writ of Passage would the result be the same?
1) When you attack with the creature, both trepanation blade and writ of passage trigger. If you put the blade trigger on the stack first, the creature will become unblockable, and then get bigger. It you put the writ trigger on the stack first, the creature will get bigger, and then the writ trigger will resolve and do nothing.
2) The creature won't lose unblockability. It will either get it or it won't, depending on its size when the writ trigger resolves.
3) If you forecast it, the creature will be unblockable until end of turn, regardless of how much bigger it gets later.
-If the creature loses "unblockability" the opponent can assign a blocker after the Trepanation Blade resolves? (I think the main question here would be whenTrepanation Blade resolves).
It depends. If you control both triggers you may resolve them in an order where Writ of Passage's trigger will resolve first, making the creature unblockable, followed by Trepanation Blade's trigger pumping the attacking creature. Write of Passage cares only about the enchanted creature's power when the creature is declared as an attacker and when the trigger would resolve. As long as its power is 2 or less at these times then the Writ will make the enchanted creature unblockable and its power can be pumped afterwards.
-If I used the Forecast option of Writ of Passage would the result be the same?
This is a little different. A forecasted Writ of Passage can be cast targeting only a creature with power of 2 or less. Given that the enchanted and equipped creature can't be attacking when you forecast Writ of Passage it should have a power of 2 or less. Once the forecast ability resolves the creature will again remain unblockable even if you pump its power later.
The forecast ability checks whether its target is legal (has 2 or less power) when you activate the ability and when it tries to resolve. It will make the creature unblockable as long as something doesn't increase its power (or otherwise make the Silcaw an illegal target) while the ability is on the stack.
The triggered ability checks whether the creature has 2 or less power in order to determine whether it triggers and when it resolves, because it has what's known as an "intervening if" clause. As long as you stack the abilities from Trepanation Blade and Writ of Passage in the correct order, the Writ's ability can be made to resolve first and thus always work (again, provided something else doesn't increase its power while the ability is on the stack.)
After either of the abilities resolves and makes your creature unblockable, it will continue to be unblockable for the duration of the turn regardless of whatever else happens to it. Notably, having its power increase doesn't make it stop being unblockable. If a power increaase stopped the unblockability it would say something like "for as long as the creature's power is 2 or less" on it.
One last question (since you are all being so nice).
If I have that combo (Screeching Silcaw + Writ of Passage + Trepanation Blade) on the table BUT I also have something with exalted in my control (and my Screeching Silcaw attacks alone), does the same "stack in the correct order" rule apply also for the +1/+1 exalted will grant (making the combo still be possible)?
-If the creature loses "unblockability" the opponent can assign a blocker after the Trepanation Blade resolves? (I think the main question here would be when Trepanation Blade resolves).
-If I used the Forecast option of Writ of Passage would the result be the same?
thanks for the help.
2) The creature won't lose unblockability. It will either get it or it won't, depending on its size when the writ trigger resolves.
3) If you forecast it, the creature will be unblockable until end of turn, regardless of how much bigger it gets later.
It depends. If you control both triggers you may resolve them in an order where Writ of Passage's trigger will resolve first, making the creature unblockable, followed by Trepanation Blade's trigger pumping the attacking creature. Write of Passage cares only about the enchanted creature's power when the creature is declared as an attacker and when the trigger would resolve. As long as its power is 2 or less at these times then the Writ will make the enchanted creature unblockable and its power can be pumped afterwards.
This is a little different. A forecasted Writ of Passage can be cast targeting only a creature with power of 2 or less. Given that the enchanted and equipped creature can't be attacking when you forecast Writ of Passage it should have a power of 2 or less. Once the forecast ability resolves the creature will again remain unblockable even if you pump its power later.
[card=Jace Beleren]Jace[/card] = Jace
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The first rule of Cursecatcher is, You do not talk about Cursecatcher.
Screeching Silcaw + Writ of Passage + Trepanation Blade
The forecast ability checks whether its target is legal (has 2 or less power) when you activate the ability and when it tries to resolve. It will make the creature unblockable as long as something doesn't increase its power (or otherwise make the Silcaw an illegal target) while the ability is on the stack.
The triggered ability checks whether the creature has 2 or less power in order to determine whether it triggers and when it resolves, because it has what's known as an "intervening if" clause. As long as you stack the abilities from Trepanation Blade and Writ of Passage in the correct order, the Writ's ability can be made to resolve first and thus always work (again, provided something else doesn't increase its power while the ability is on the stack.)
After either of the abilities resolves and makes your creature unblockable, it will continue to be unblockable for the duration of the turn regardless of whatever else happens to it. Notably, having its power increase doesn't make it stop being unblockable. If a power increaase stopped the unblockability it would say something like "for as long as the creature's power is 2 or less" on it.
One last question (since you are all being so nice).
If I have that combo (Screeching Silcaw + Writ of Passage + Trepanation Blade) on the table BUT I also have something with exalted in my control (and my Screeching Silcaw attacks alone), does the same "stack in the correct order" rule apply also for the +1/+1 exalted will grant (making the combo still be possible)?
thank you all (again).