In the Comprehensive rules, 800.4a there are a few examples of what happens as a player leaves the game to permanents he / she controls but doesn't own. I am specifically interested in examples 2 and 3:
Example: Alex casts Act of Treason, which reads, in part, “Gain control of target creature until end of turn,” targeting Bianca’s Runeclaw Bears. If Alex leaves the game, Act of Treason’s change-of-control effect ends and Runeclaw Bears reverts to Bianca’s control.
Example: Alex casts Bribery, which reads, “Search target opponent’s library for a creature card and put that card onto the battlefield under your control. Then that player shuffles his or her library,” targeting Bianca. Alex puts Serra Angel onto the battlefield from Bianca’s library. If Bianca leaves the game, Serra Angel also leaves the game. If, instead, Alex leaves the game, Serra Angel is exiled.
So, clearly, we have two effects, both giving Alex control over creatures owned by Bianca. Then Alex loses, and the result is that Bianca gains control over the bears, while the angel is exiled. Clearly something is different between these two ways of gaining control over a creature.
Up until now I had thought that a permanent only tracks two players: its owner, and its controller. However, if this were the case, then both creatures would be creatures owned by Bianca, controlled by Alex, and they would both end up the same place after Alex loses. Clearly, this is not the case.
There are two differences between how these two permanents have come under Alex' control. The angel has been put directly into play by an effect owned by him, with permanent control, while the bears has been put into play by Bianca, and then Alex has taken control untilthe end of turn. So there are two differences that I can see:
- The angel is subject to a permanent change of controller, while the bears are only temporarily under Alex' control
- The angel was put into play by an effect controlled by Alex, while the bears were put into play by an effect controlled by Bianca
Both of these would require a permanent to not only remember who controls it and who owns it, but in addition either who put it into play or whether the control is temporary. Regardless of which one it is it goes against how I thought the game worked.
Which one is it? And why isn't it the other one?