Whenever you choose to put one or more cards on the bottom of your library while scrying, exile that many cards from the bottom of your library
Check this out: If your opponent in control of Hive Mind plays a couple of Pacts, you are facing a bitter destiny unless you happen to control a Sundial of the Infinite, whose ability will exile the triggers of your Pacts (the copies gifted to you through Hive Mind) from the stack, and you wont be facing the choice of paying lots and lots of mana (which you might not even have access to) or losing the game
Most of the Jeskai Tempo decks only play two copies of Sarkhan, the Dragonspeaker as their planeswalker with the occasional deck playing one or two copies of Chandra, Pyromaster along with Sarkhan
The first and most immediate weakness lies in the creature-equipment ratio
Ulvenwald Observer While Treefolk decks might seem a little clunky and slow, they are certainly flavorful, and if your deck is filled with ramping spells and powerful mana rocks, you can be well on your way to victory as long as you find the right Treefolk when you need them