story time about the GM deciding who your target is, even when you specify someone else?

Does our GM putting a pillar which attracts/absorbs magic in the middle of the battlefield count?

Once, in an Earthdawn campaign, a Horror swallowed a few party members during the battle, but the way it appeared was that the characters simply disappeared.

Then, for two rounds, every attack on the horror was an attack on another party member. Those who were swallowed were hitting those who weren't swallowed. When damage was rolled, The Werefrog saved party members damage rolls and applied them to the party member that was hit. Same for to hit rolls.

After the two rounds, the ability wore off, but the damage to the party members was still there. Also, they could then see their wounds looked more like they were hit by weapons, not the claws/teeth of the horror.

“Is this the work of an enemy Stand?!”