It's a Fighting-type, which will likely mean it ends up in a heavy deck
Crypt Rats There are better ways to deal large amounts of damage to creatures and players, but Crypt Rats are a really fun way to wipe the battlefield if you have enough black mana
But this begs the question as to why you were casting the Research side of the split card in the first place when you could already have the cards you were looking for in your deck
Its why weve been running Mizzixs Mastery in the sideboard over Past in Flames.Overall, I think the playability of Echo of Eons is likely greater than Mizzixs Mastery
Ashiok's Forerunner Azula, Cunning Usurper Callidus Assassin Cunning Nightbonder Ertai Resurrected Ghost, Spectral Saboteur Lochmere Serpent Mischievous Sneakling Notion Thief Nymris, Oona's Trickster Obyra, Dreaming Duelist Slitherwisp Soaring Thought-Thief Torpor Dust Ulamog's Nullifier Waterlogged Teachings Weeping Angel Whisper Agent Wydwen, the Biting Gale Zareth San, the Trickster
Chase potential every pack is a shot at the sets hottest pulls: Mega Evolution Pokmon ex, Stellar Tera Pokmon, and Special Illustration Rares