In Magic: The Gathering, tutors are a special type of card that let you fetch up another card of your choice out of your deck
Of the Eldrazi lands, I chose Eye of Ugin from this deck to make my Top 10 list
Either your opponent loses 7 life per turn, or loses their creatures and gives you card advantage
Whenever Elder Brain attacks a player, exile all cards from that player's hand, then they draw that many cards
Note that you can suspect your stuff if you need to kill someone
Crystals The full colored cycle of Crystals reduce costs, and each one has a static ability and an activated ability, so the 4 mana value slot is a key one to launch you into the the biggest and strongest cards, and rely on 2-mana rocks to curve into these on turn 3