limited edition 23k gold plated charizard pokemon card #6 Trading in Red Ball Pokemon Charizard 23k Gold-plated Trading

No Mercy's ability triggers whenever any creature, including creatures you control, deals damage to you, not only combat damage

If so it should sit at the top of this list however it is an incredibly tough card to evaluate so I will need to do some significant testing before I insert the Promised End into this list

Because I certainly have

Six trample damage, two instances of Bramblecrush and a 5/5 trample left in play is a lot of value

This is exactly whats happened to Key to the Archive, recently, which has found itself in some hot water

Otherwise, Splicing Fell Beasts Shriek onto an instant can give this instant speed effects to potentially catch an opponent with their pants down