If it's a rarer card, you will need to spend a certain amount of Trade Tokens, depending on its rarity
Unaffected by card effects that prevent it from attacking, also its attacks cannot be negated
Probably not, though there's no guarantee of that, admittedly
This Skill can only be used once per Duel.) Monsters (10) Extra Deck (3) Spells (5) & Traps (5) Level-up rewards[] The following lists are the rewards the player accumulates from having Joey Wheeler (DSOD) reach a certain Level
So if you're playing a one-for-one game, where they play a creature, and you make them sacrifice it, eventually you're just going to have numerous copies of Chainer's Edict in the graveyard waiting to do it all again
This guide will help you make the most of your cards and help you get the most money for your cards