A player untaps, casts a sorcery, then realizes he forgot to draw.

Simple stuff right? Make a quick check to be sure he has one card less, GRV, draw your card now.

Now what if the player was controlled via Mindslaver?
(It actually happened, yesterday, during a pptq).

Who has responsability for the actions of a controlled player?
What if a player commits DEC while controlled?

Can the controlling player make the controlled player miss his triggers? Can he say “you attack with this creature, and you miss Exalted?”

The controlled player (AP) is still responsible for playing correctly and remembering triggers.

The controlling player (NAP) doesn't have to remind the controlled player of triggers; their responsibility to maintain the game state is much the same as when they aren't controlling the turn. They just get to make decisions.

If NAP said “attack with this, miss Exalted” then AP would definitely notice and thus remember their trigger.

If NAP said “attack with this, I'll block with this”, AP might miss Exalted, and NAP doesn't have to remind him - again, just like normal.

d:^D

Originally posted by Francesco Scialpi:

What if a player commits DEC while controlled?

Even though this sounds like a difficult scenario, it really shouldn't be. There are two ways that I see players use Mindslaver:

1. I'll tell you what to do, please just keep your hand and all relevant cards revealed for me.
- This one is the best as a whole, since it keeps the responsibilities of each player clear. AP is still playing and is in charge of taking the requested actions, and NAP only makes decisions. Should AP draw an extra card for whatever reason, then we follow typical DEC procedure. (The wording of DEC would suggest that this penalty would NOT be downgraded - “ If the identity of the card was known to all players before being placed into the hand…” - but that fails the common sense test given that both players can see the hand, and I would bring that up with my HJ or TL when asking about applying DEC to this scenario at a larger event. Of course, it could be possible for AP to draw an extra card before NAP could actually see the hand, but that's getting toward the corner-case area of things).

2. Give me your hand, I'll take physical control of your turn.
- This one is where I'm not entirely certain, but this would seem to fall more under GRV territory than DEC (you can't draw a card into your opponent's hand, and even then the advantage from doing such is questionable, outside of nefarious deeds). While taking physical control is not ideal (perhaps technically illegal, although it's something that wouldn't need enforcement) both players should still be involved in making sure that the game is being played correctly. (EDIT: As another way of looking at this, the opponent drawing the card into your hand could be considered confirmation of drawing the card, and thus the penalty is not Drawing Extra Cards, although this may be stretching the policy.)

Beyond that, as Uncle Scott stated, the responsibilities of each player are more or less the same.

Edited Peter Richmond (July 6, 2015 04:36:20 PM)

Peter, remember that according to the IPG, it's not DEC if “the player received confirmation from his or her opponent before drawing the card.” In most cases of situation 1, and all cases of situation 2, it's pretty easy to rule that the opponent confirmed the draw.