My first reaction to this question was "of course not, there is no card which is able to generate such loops by itself". Such a card would be just too easy to abuse; generally speaking, one needs two cards to work together to generate a loop of actions (which can be executed an arbitrary number of times (see rule 720 for more details). Many of these combos require a third card to actually profit from the loop.
But is this actually true? Or are/were* there any Magic cards capable of generating such loops alone? I don't expect the loops to win the game by themselves, of course.
*: cards may have later received errata to prevent loops; I'd be interested in those cases as well.