0 is standard, going negative causes the spring to ease up, going possitive causes the spring to tension more
One such card could be Cecil, Dark Knight, which costs 1 Black mana for a 2/3 Legendary Creature with Deathtouch, but it arguably has a downside that is not necessarily its Darkness ability, but the fact that one can't have multiple copies of this card on the battlefield at once
This perfectly captures his heroic final stand where he sacrificed himself to save Cloud and passed on both his legacy and the iconic Buster Sword
You might think folks would prefer to buy a real gemstone with that money
Another time they had something with a Spellskite out, so I just kept activating that until they died
Couldnt recommend more, thank you for all your hard work and help