Each Play Booster includes 14 Magic cards, with 1 to 4 rares or better, 3 to 6 uncommons, 6 to 9 commons, and one land card
Once a creature that has reach because of Sphere Grid's last ability has blocked a creature, removing all +1/+1 counters from that creature or causing Sphere Grid to leave the battlefield won't cause that creature to stop blocking
Its going to be $10, like Jadelight Ranger was) Sell six months before rotation: Carnage Tyrant, History of Benalia Buy when it rotates and is cheapest: Mox Amber (going to get broken at some point, already ticking up in Commander), The Immortal Sun
Attacking with Aphelia lets you pay two mana to make a 1/1 Snake token with deathtouch, setting up her next ability
I like the Sea Troll
Food for thought: only five other cards in Magic let you pull any creature or artifact from the yard to hand: Emergency Weld, Fortuitous Find, Remember the Fallen, Restoration Gearsmith, and Treasury Thrull