A fifth set will land on August 9th, followed by a wider launch on August 23rd
Laboratory Maniac $6.00 Laboratory Maniac was (as far as I know) the first alt-wincon for an empty library, and it completely turned the way certain decks play on their head
One slot in a booster pack is set at Rare or higher, so in theory you should get one Rare per booster, but Super Rare and higher cards are much scarcer
At the time, we were concerned that having access to fifteen-card "wishboards" in Best-of-One would result in a power imbalance between Best-of-One and Best-of-Three
Innkeeper's Talent provides three fantastic effects split between its three tiers: for two mana you get a +1/+1 counter on one of your creatures each time you enter the combat phase, then, for one more, all of your permanents with counters get ward 1, and finally, for four more mana you'll double the number of counters you get on every permanent you control
Theres a reason for thatand its all because of Uri Geller