Theyre extremely powerful, even if theyre circumstantial and depend on the state of the game
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
Thankfully, it also lets you really plan ahead by giving the top card of your library Plot equal to its mana cost (as long as its a nonland card) and allowing you to cast it with that Plot cost directly from the top of your deck
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
Card tags (like Pirate) create strong synergies within your deck, giving you extra strategic advantages
If a card or token would be put into your graveyard from anywhere, exile it instead