From The Ashes: Mechanics

Monstrosity: If this creature isn't monstrous, put PARAM1ASWORDS +1/+1 counters on it and it becomes monstrous. Used on 6 cards: Bristling Baloth, Hungering Tunneler, Slumbering Hellion, Monstrous Matriarch, Clawshifter, Jackal Whelp

Charge up: Whenever you cast a noncreature spell, you may pay {1}

. If you do, put a +1/+1 counter on this. Used on 9 cards: Battle-trance Bloodletter, Suncrested Ibis, Mystic Mantle, Volcanic Heretic, Echo of Imra, Pentient Astrologer, Star Channeler, Crackling Runehorn, Honor Seeker

Charge Up is a mechanic that is designed to fill a similar role to prowess while working better with more average, midrange-y draft decks. It also creates more choices around sequencing which is something I'm trying to encourage with this set's mechanics.

In card text or details pages, write the mechanic's code name (playtest name) between square brackets, like "[Crittercast]", "[Bushido 1]" or "[Delay 4 {2}{R}{R}]". It will be expanded to the mechanic's name plus reminder text, such as "Suspend 4 – {2} {r} {r} . (Rather than cast this spell from your hand,...)"
To expand a mechanic's name but not its reminder text, include parentheses at the end of the square brackets: "[Crittercast()]", "[Delay 9 {R}()]".