Whenever Norman Osborn deals combat damage to a player, he connives. (Draw a card, then discard a card. If you discarded a nonland card, put a +1/+1 counter on this creature.)
: Transform Norman Osborn. Activate only as a sorcery.
Flying, menace
Spells you cast from your graveyard cost less to cast.
Goblin Formula — Each nonland card in your graveyard has mayhem. The mayhem cost is equal to its mana cost. (You may cast a card from your graveyard for its mayhem cost if you discarded it this turn. Timing rules still apply.)
Norman Osborn is a 2-mana evasive engine: he's unblockable, connives on combat damage to filter draws and grow, then flips into Green Goblin to flood the board from your graveyard. You loot/discard powerful spells, then replay them cheaply via mayhem or the cost reduction, generating massive card advantage that snowballs into a Grixis spellslinger or value finish.
Cheap, evasive commander that draws cards and grows every turn it connects
Turns the discard half of connive into a resource via mayhem and graveyard recasting
Grixis access to the format's best card draw, removal, and reanimation
Self-recursion makes the deck extremely resilient to spot removal and board wipes
Flexible: equally good as combo enabler, spellslinger, or value engine
Frontside is fragile—small body that dies to any removal before value piles up