With Dragoons Lance (another Choose A Job equipment) we see that they are reasonably being typed as Knights, as that equipment gives +1/+0, and makes them a Knight
While it is limited to target nonblack creatures, in a game where youre low on mana, being able to remove a lot for one black is not bad
Leonin Skyhunter Rarity: Uncommon TYPE: Creature SUBTYPE: Cat Knight CMC: 2 Mana cost: USD: $0.28 EUR: 0.20 TIX: 0.02 EDHREC RANK: 15776 (2/2) Flying Leonin Vanguard Rarity: Uncommon TYPE: Creature SUBTYPE: Cat Soldier CMC: 1 Mana cost: USD: $0.52 EUR: 0.72 TIX: 0.02 EDHREC RANK: 12629 (1/1) At the beginning of combat on your turn, if you control three or more creatures, this creature gets +1/+1 until end of turn and you gain 1 life
In Ravnica's Loyalty, the combination with Wasteland Reclamation inflated the damage to my end stage on a large scale, and the potential rose to the point of finishing with this card alone, creating an archetype called Temur Control
With these shortcomings in mind, I generally reserve Beseech the Queen for 1-2 color decks, or any deck that can consistently access Urborg, Tomb of Yawgmoth early in the game