Paying for your draw spell with an installment plan lets you keep up mana each turn, which can keep you more flexible
7 Feral Encounter Feral Encounter is a cost-efficient way to get a creature from the library's top onto the battlefield, although casting that creature's mana cost and Feral Encounter's own cost means this card is best used in the mid to late game
Wonder (Odyssey/Torment/Judgment) Odyssey Block dealt heavily in the graveyard, between threshold, flashback, madness (discarding cards) and the Judgment Incarnations
Mothim has some unique traits, such as no Retreat Cost, and it is one of the few Grass types weak to Lightning instead of Fire
Sigiled Behemoth The exalted attack bonus is the same no matter what creature its on, so you prefer it on lower cost cards to get them into play more reliably
There are lots of returning mechanics in the set