Usually, the unknown in Magic is in the opponents hand or their library which is threatening, for sure but what if that element of surprise that could be anything was already on the battlefield, attacking your opponent
Elder Deep-Fiend: Reads like a junk rare
This is a rare card from Archazias Island and while not one of the most valuable in the set, can help you get some cards back from the discard
Resolute Heart lets Pikachu ex survive an attack if it is Knocked Out from full HP, letting you reset it to its last 10 HP
If you don't control an Army, create a 0/0 black Orc Army creature token first.) Sorcery Wake the Dragon Create a 6/6 black and red Dragon creature token with flying, menace, and "Whenever this token deals combat damage to a player, gain control of target artifact that player controls." Flashback (You may cast this card from your graveyard for its flashback cost