Spells can also be used to boost minions or perform various other abilities
Flavor-wise, black cards show the boundaries you'll push in order to obtain power and achieve your goals
The card itself is actually a 6/4 Giant for 4 Mana and not a 3/4
That's what happens when you combine Tinker (which could get out the Jar almost immediately) with Megrim (so that your opponent would take 14 damage from a single Jar discard, assuming they could not play any cards in time)
We absolutely crushed slower controlling decks and actually did a surprisingly good job against midrange creature decks as well, even beating a Turn 3 Rotting Regisaur that attacked us for something like 10 straight turns by chump blocking it with our random mill dorks)
Stagger Whenever Lightning deals combat damage to a player, until your next turn, if a source would deal damage to that player or a permanent that player controls, it deals double that damage instead