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From a card design standpoint, this is captured with the creation of the Daybound/Nightbound mechanic on werewolves

It set the tone for Blue's ability to accrue raw card advantage

2 Robin Hood, Champion Of Sherwood This Robin Hood throws his hat into the ring of being one of the best, not just in Steel decks but any deck

At the end of combat on your turn, if a player was dealt 6 or more combat damage this turn, transform this enchantment, then attach it to a creature you control

Signature Spellbooks have usually sold for around $20 so it is likely that the non-foil Commander Collections will being around that price