Not only do we use our experiences to know what mechanics and designs work best, but we can reuse discarded ideas in different contexts where they function better
If you have 3 or more rested Characters, Sabo will draw 1 card when he attacks, so its important to attack with other Characters first to ensure you have 3 rested Characters
It doesn't copy whether that permanent is tapped or untapped, whether that permanent has any counters on it or any Auras and/or Equipment attached to it, and it doesn't copy any non-copy effects that have changed that permanent's power, toughness, types, color, abilities, or so on
This card is a nice alternate wincon for legends decks, putting the Hammer down on everyone
Promo cards: 8 types (1 of each)