8 Mulan (Ruby) Mulan: Imperial Soldier is an undeniably powerful character in the right circumstances, but it's easy to overlook this card due to the circumstances being fairly narrow
Method one is to use it as the kill in an engine or abuse it with cards that return to hand, which would occasionally happen, but it was rare as there were generally more efficient engines
Colossus Hammer has popped up from time to time in Pioneer decks alongside Resolute Strike and Kemba, Kha Enduring
There are also plenty of cards that feel more deck-specific, such as [[Kitsunes Technique]] in a Mill deck, [[Rat King, Verminister]] in card limit break decks, and [[Splinter, Radical Rat]] in a Ninja build
Well want to pick one that buffs our creatures to get more value from Shadowheart