White and black have some of the best ways to trigger Minthara's effect, either by blinking creatures with Ephemerates or sacrificing them with a Carrion Feeder
Throw him into a Zacama, Primal CalamityZacama, Primal Calamity, Gishath, Sun's AvatarGishath, Sun's Avatar, or even the brand new Pantlaza, Sun-FavoredPantlaza, Sun-Favored, and hell play a support role of handing out counters like an usher at a theatre show
The Archivist of Gondor lets you double up on this effect, drawing two cards at the start of the monarchs end step
Return a permanent to its owner's hand This is another area where blue is king
A 5/5 flying, trample creature is already strong, but being able to draw one or two cards in your first end step and then up to four extra cards per turn can leave opponents in the dust
You can tap any untapped artifact you control to pay the cost of the mana ability, including an artifact creature you haven't controlled continuously since the beginning of your most recent turn