Mind's Dilation (The Watcher's Warning) by Rafater

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Mind's Dilation (The Watcher's Warning) by Rafater
Infinite wisdom cannot be contained within a single mind.
-Mind’s Dilation
Okay so person A, person B, person C and person D all have minds dilation, and person A plays a card, how would all the minds dilation play out? Thank you and sorry for the weird question. X
Assuming that A B C D is also the turn order and it’s A turn, then the Mind’s Dilation of each of the other three players will trigger. B will put their trigger on the stack first, then C, then D.
D’s trigger resolves first and exiles the top card of A’s deck. Assuming it’s a nonland card and that D chooses to cast it, the spell goes on the stack and A B and C’s Mind Dilations each trigger.
This gets a bit complicated, so I’ll just sketch out the state of the stack from bottom (on left) to top (on right) step by step. [Mind’s Dilation triggers will be denoted in the style of B’s trigger [A], meaning that it’s a trigger controlled by B caused by A casting their first spell of the turn.] This is assuming that all cards revealed to Mind’s Dilation are nonland cards and that players always choose to cast those cards.
A’s spell [A], B’s trigger [A], C’s trigger [A], D’s trigger [A]
D’s trigger [A] resolves, casting D’s spell [A] and triggering A B and C’s enchantments.
A’s spell [A], B’s trigger [A], C’s trigger [A], D’s spell [A], A’s trigger [D], B’s trigger [D], C’s trigger [D]
C’s trigger [D] resolves, casting C’s spell [A] and triggering A B and D’s enchantments.
A’s spell [A], B’s trigger [A], C’s trigger [A], D’s spell [A], A’s trigger [D], B’s trigger [D], C’s spell [D], A’s trigger [C], B’s trigger [C], D’s trigger [C]
D’s trigger [C] resolves, casting D’s spell [C]. (Nothing triggers because D has already cast a spell this turn.)
D’s spell [C] resolves
A’s spell [A], B’s trigger [A], C’s trigger [A], D’s spell [A], A’s trigger [D], B’s trigger [D], C’s spell [D], A’s trigger [C], B’s trigger [C]
B’s trigger [C] resolves, casting B’s spell [C] and triggering A C and D’s enchantments
A’s spell [A], B’s trigger [A], C’s trigger [A], D’s spell [A], A’s trigger [D], B’s trigger [D], C’s spell [D], A’s trigger [C], B’s spell [C], A’s trigger [B], C’s trigger [B], D’s trigger [B]
At this point, each player has cast a spell this turn and thus Mind’s Dilation will no longer trigger. The stack no longer grows from this point beyond triggers turning into new spells, which then resolve.
D’s trigger [B] resolves, casting D’s spell [B]
D’s spell [B] resolves
C’s trigger [B] resolves, casting C’s spell [B]
C’s spell [B] resolves
A’s trigger [B] resolves, casting A’s spell [B]
A’s spell [B] resolves
B’s spell [C] resolves
A’s trigger [C] resolves, casting A’s spell [C]
A’s spell [C] resolves
C’s spell [D] resolves
B’s trigger [D] resolves, casting B’s spell [D]
B’s spell [D] resolves
A’s trigger [D] resolves, casting A’s spell [D]
A’s spell [D] resolves
D’s spell [A] resolves
C’s trigger [A] resolves, casting C’s spell [A]
C’s spell [A] resolves
B’s trigger [A] resolves, casting B’s spell [A]
B’s spell [A] resolves
At long last, A’s spell [A] resolves!!
The final result is that each player will have cast a spell from each of their opponents’ libraries and A will have cast a spell from their own library, but the order is complicated, as you can see.
The card is in good condition. | eBay!
I play Mind's Dilation. Afterwards, during their Main Phase, my opponent casts their first spell of the turn and the exiled card is a Sorcery. When may I cast it?
Only during the resolution of Mind’s Dilation’s trigger.
If an effect like Mind’s Dilation allows you to cast a card and doesn’t specify a time period in which you can do so, then you have to do so during the resolution of that effect, no matter what the spell’s type or normal timing restrictions. It’s only when a time period is specified (e.g. “until end of turn, you may cast”) that you can cast it at other times and have to obey normal timing rules.