Ultimecia, Temporal Threat and Lightning, Security Sergeant are the cheapest two, worth about $1.20 and $1.40, respectively
MIRRODINSANITY Mirrodinsanity is available in traditional foil and non-foil
Living End (3.6% of the Winner's Metagame) 4 Misty Rainforest 4 Endurance 4 Generous Ent 4 Shardless Agent 4 Street Wraith 4 Subtlety 4 Force of Negation 4 Curator of Mysteries 4 Ardent Plea 3 Living End 3 Waker of Waves 2 Sink into Stupor 2 Colossal Skyturtle 1 Breeding Pool 1 Forest 1 Hedge Maze 1 Island 1 Otawara, Soaring City 1 Boseiju, Who Endures 1 Mistrise Village 1 Hallowed Fountain 1 Lush Portico 1 Meticulous Archive 1 Temple Garden 1 Commandeer 1 Striped Riverwinder 1 Wistfulness 3 Mystical Dispute 3 Clarion Conqueror 2 Inevitable Betrayal 2 Force of Vigor 2 Teferi, Time Raveler 1 Foundation Breaker 1 Harbinger of the Seas 1 Deafening Silence Living End is a combo deck that aims to cycle several creatures, play Shardless Agent, then cascade into Living End, wiping all creatures from the battlefield while returning all the cyclers
$140.00 Out of stock
A 3/4 flash with reach is also a fine Ambush Viper that applies a bit of pressure
With no in-game hints or links to clarify the process, you may be sitting on some codes that you have no way to redeem