If a cards first number is higher than the second number, like if it read 112/105, then its a more valuable Secret Rare card
But you harness it by paying seven mana which exiles a creature you control
Skittering Cicada is the insect version of that, and it works wonders in decks like Ulalek, Fused Atrocity that benefit from creatures entering at instant speed
Brainstorm Aside from being a generally decent card, you can cheat the fairness on Brainstorm by shuffling away the cards you put back on top, usually with a fetchland
You want 0/3 reach in ramp decks to survive the early game and ramp
Though it's a huge blow out if someone kills The Great Synthesis after chapter two, as you'll have bounced your own commander to hand and be left with no resources except the 14+ cards in your hand (how will you cope?), if you are able to get the final chapter off, it's basically a guaranteed game over