Sans

Partner with Papyrus, Puzzle Master
(Mana Costs are loyalty abilities, P/T is base Loyalty)
+{4}: Create a Black 2/1 Skeleton Creature Token
+{1}: Investigate
-{3}: Create a Black 4/1 Skeleton Creature Token With Menace and Give all Skeletons Haste and Menace until end of turn
-{9}: Copy all Tokens you control and give the creature copies Haste
Sans can be your Commander