Conflicting Global Blocker Manipulation

[alleyviepr]

Swords of Revealing Light:

Global: Pay [Mask]. Target monster cannot block this turn.

Goblin Attack Force:

Global: pay [Fist]. Target Monster must block this turn (if legal).

If my opponent uses Swords' global on one of my monsters, and I then use GAF's global on that monster, which takes precedence? Does the active player decide? Does GAF's even work given the parenthetical 'if legal'?

If the Swords global takes precedence, or the active player gets to choose, then what happens if I use GAF's global a second time on my monster?

[dmrulesteam]

Swords of Revealing Light:

Global: Pay [Mask]. Target monster cannot block this turn.

Goblin Attack Force:

Global: pay [Fist]. Target Monster must block this turn (if legal).

If my opponent uses Swords' global on one of my monsters, and I then use GAF's global on that monster, which takes precedence? Does the active player decide? Does GAF's even work given the parenthetical 'if legal'?

If the Swords global takes precedence, or the active player gets to choose, then what happens if I use GAF's global a second time on my monster?

As per the rulebook, can't trumps can (or must). The die wouldn't be able to block.

-The Dice Masters Rules Team