The Standard Format Changes, sometimes twice a year depending on set releases, will have the most up-to-date rules for tournament play
Elder Dragon Highlander (EDH), better known as Commander, is perhaps the most popular format of Magic right now
But costing an effective 6 mana to return a permanent to your hand rather than the battlefield is a lot
This is one on the list that wasnt obtained by competition, or a lottery or some kind of crazy luck
Other fans have reported some workarounds that seem to help alleviate the issue, including resetting the app
Plus, these cards were deisgned with insight from the Commander Format Panel, so there were a lot of invested eyes on these cards, and I put faith in the members of that Panel