You have to tap those tokens to use them, so it does limit your ability to use things like Treasure and Clue tokens, but does give you the opportunity to keep everything open until your last opponent's end step to start using Baylens abilities
Each Mystery Booster: Convention Edition booster pack contains fifteen cards: fourteen from the gigantically awesome main set, and one from that "something new and surprising" group of R&D Playtest cards
If you have another way to cause damage, perhaps with Tinkerbell - Giant Fairy, then you can quest again in the same turn
Typically a Core Set contains a large percentage of staple cards, re-printed from older expansions
Then you add four to get a second card as it harmonizes all your creature synergies
Reanimate, Growth Spiral, Boros Charm even Demonic Tutor if you need to find a card that Spellseeker cant