In the late game, a 2/1 menace creature just isnt likely to get through in combat
9/9 Sure, welcome back, Avacyn
Token copies still have a mana cost, so a curve like Woe Strider into Nightmare Shepherd into Gary drains for 10 immediately, and the 4/4 flyer could help finish the game off
Casting an efficient removal or card draw spell multiple times for free (if you can flicker or otherwise trigger the Chancellor) can give you a solid advantage, and the fact that ramp and spells get better every year means this card does, too
when played, it adds 1 to your mana pool and allows you to draw a card (if you have 7 in hand)
Graded Population Report: Skeledirge ex #258 Visualize the distrbution of grades in the chart