Beacon of Tomorrows is probably the fifth best one after actual Time Walk, casual favorite Time Warp, and its P3K and Portal variants, but three of those spells are only available for big bucks
If you gain control of another player's permanent and it phases out, if the duration of the control-change effect expires before it phases in, that permanent phases in under that other player's control as your next untap step begins
This is not a complete list of exclusions and exclusions can vary by policy.
Two of which are as follows: Proper Magic design requires a strict set of rules
How do I keep track of the Expanded format results
Twenty-one total Lessons is all I could find that was even a little bit playable, and of those, several wouldn't be if you had to put them in the main deck