Urza, Rejoiced Headmaster

+1: Urza gains all loyalty abilities of all planeswalkers that add loyalty until end of turn. You may activate one more loyalty ability this turn
0: Urza gains all loyalty abilities of all planeswalkers that add 0 loyalty. You may activate one more loyalty ability this turn.
-1: Urza gainsall loyalty abilities of all planeswalkers that subtract loyalty until end of turn. You may activate one more loyalty ability this turn