Alakazam has a number of big-money cards on the secondary market, including this one, though this Psychic-types most valuable cards hail from the e-Card series of sets: Expedition, Aquapolis, and Skyridge
This distinction from the Zendikar Rising symbol is to indicate and remind players that they aren't legal in Standard, as this printing of Expeditions doesn't impact what formats these cards are legal in
As for Solitude itself, its one of the evoke elementals and is a very powerful card
However, I think Varragoth, Bloodsky Sire is a super slept-on commander that deserves more love for mono-black, especially as Krrik proves itself to be more and more fragile as interaction gets better
A variety of cards, including Olivia, Opulent Outlaw , Misfortune Teller , and Life Insurance will generate a fair pile of Treasure tokens, while others like Captain Lannery Storm and Vihaan, Goldwaker give you something to do with them aside from generate mana
~Side loading to keep cards securely in place
