He is the primary adherent of a philosophy of Balance, which holds that the Multiverse is a collection of opposing forces, each one trying to tip the scales of fate in its favor
Instead of paying some amount of mana for an extra ability like Kicker does, Bargain demands that the player sacrifices an artifact, enchantment, or token to cast the Bargain spell with an additional effect
Because a player can only cast sorceries during their main phases, while the stack is empty, you cant cast sorceries in response to counterspells
The Adventure land has three mana to sac an artifact or dork and I tossed in Treasure Vault too
Players can cast spells and activate abilities (such as Kindlespark Duo's own activated ability) after the triggered ability resolves but before the spell that caused it to trigger does
They bring in a sense of unpredictability and spice that make your matches more exciting