Amonkhet: mechanics

Amonkhet set is on the way, hence it is high time to introduce mechanics:

• Exert is an ability that appears only on creatures. You make the decision whether or not to Exert the creature when you declare attackers. If you choose not to Exert the creature attacks as normal. If you do Exert, you get a bonus, but the creature does not untap during your next untap step.
• Embalm is an ability that can only be activated if the creature is in the graveyard. When activated, the card is exiled and creates a token copy of itself. This creature token is a copy of the embalmed creature, except that it is a zombie in addition to its other creature types and monocolored.
• Cycling is a returning ability, which allows a player to pay a cost that includes discarding the card. When the activated ability resolves, that player draws a card.