Be careful not to lose too many of your own tokens, though you can always filter your Treasure mana into this spell to make good use of them
A big reason Hogaak decks were so strong, for example, was that you could sacrifice Hogaak over and over again to Altar of Dementia and mill opponents out while still having a large board in the process

Scientists Academy Elite Academy Loremaster Academy Wall Accumulated Knowledge Acquisition Octopus Aeon Chronicler Aether Channeler Aether Syphon Airborne Aid Alandra, Sky Dreamer Alchemist's Apprentice All-Seeing Arbiter Alphinaud Leveilleur Amass the Components An Unearthly Child Ancestral Reminiscence Aphetto Runecaster April O'Neil, Hacktivist April O'Neil, Live on the Scene April, Reporter of the Weird Aquitect's Will Arcane Denial Arcane Investigator Arcane Subtraction Archive Haunt Archivist Archmage Ascension Archmage Emeritus Archmage of Runes Argent Mutation Arrester's Admonition Artful Looter Artificer's Epiphany Artistic Refusal Ascendant Spirit Assassin Gauntlet Astral Wingspan Astrologian's Planisphere Atemsis, All-Seeing Atlantean Cavalry Atlantean Skirmisher Attuma, Atlantean Warlord Aura Finesse Aven Fisher Avian Oddity Azami, Lady of Scrolls Azure Mage B.O.B
Traditional Ranked is a best-of-three battle that adds sideboarding to the mix
#20 Anzrag, the Quake-Mole 174.94 While not as pricey as the top cards, its unique abilities make it a collectible card.