You only need to deal damage with your commander to activate freerunning on this card, and it fits decks that want to start attacking early, or decks that win via commander damage
Be proactive Honestly, this could probably be the mantra for most Modern decks, but it's particularly true with Infect
As cards get more expensive, making fake cards becomes more lucrative, in part because the number of players who can afford a legitimate Underground Sea or a playset of Mox Opals gets smaller and smaller
Spellbook is like Reliquary Tower in that it costs literally no mana to play, plus it is fetchable like Library of Leng with Trinket Mage
Currently, the D23 Promo version of Captain Hook is valued at about $1,300 on TCGPlayer
Venser is less good as an agro card than Riftwing Cloudskate but is superior in all other regards and for all other archetypes while being a very similar kind of card