With all that Greaves does, youd expect it to come with a whopping price tag, but no
This one looks pretty innocuous, but I think may become a pretty decent player in Black decks that make use of a lot of counters
To play this card, I'd say you need to be into the prowess realm, or have specific synergies with enchantments/artifacts
Eight lands in play is the break-even point where you can cast this for free, though you could always run it out earlier, hope it sticks around for a turn cycle, and untap with something like 10 to 12 mana from lands alone
Arbiter of the Ideal would be a great combo
And I think many folks felt like that when the Invocations were released, and they sublimated that annoyance into aesthetic critiques