Can I target a burrowed minion or a voidwalk minion?
Not unless you have a burrowed spellcaster or a spellcaster in the void. Since the effect uses the word 'target,' the spellcaster must be in the same region as the target. (There are four regions: surface, underground, underwater, void.)
What happens if I target a minion with a Ward when conjuring this?
On resolution, the Ward will protect the targeted minion. Due to the Golden Rule, the Ward breaks and the Shackles end up at the same , not carried.
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