This set has 5 main themes

Blood-Rage - You can only activate blood rage abilities only if 2 or more creatures died this turn. Sacrifice your own (or your opponents) stuff and then activate blood rage abilities to decimate your enemies.

Realmbound - If a creature with realmbound would be put into the graveyard from anywhere its exiled instead. Use abilities on still living creatures that make use of their ancestors strength to win in a historic fashion.

Storyweave - If you would draw a card with storyweave you may instead reveal and discard it, if you do you get a unique effect. Use storyweave abilities to tell the tale of your victory.

Enveil - With enveil you can exile creature cards from your graveyard to give your creatures new abilities. Unveil your creatures true strengths and bring ruin to all those that oppose you with the power of enveil.

Obelisks - while they might not do much on their own, your creatures can use obelisks to strengthen themselves and others. Fell your mighty enemies through the power of big stone rocks.