On the third turn
Wed rather fix it than pretend thats normal.
If Gandalf, White Rider's owner has three or fewer cards left in their library when the last ability resolves, you may have it become the bottom card of their library
That is nearly five times the price of MGC Membership and you are waiting months instead of weeks
(11/10/2020) The opponent to be dealt damage is chosen at random while the triggered ability is resolving
And just look at all the Knights in the format: Benalish Knight, Burning Shield Askari, Cadaverous Knight, Fallen Askari, Femeref Knight, Knight of Valor, Searing Spear Askari, Shadow Rider, Southern Paladin, Suq'Ata Lancer, Zhalfirin Commander, Zhalfirin Crusader, and Zhalfirin Knight