Kythos Divided: Mechanics

Progress: To progress reveal cards from the top of your library until you reveal a nonland card with converted mana cost less than ~ and put it into your hand. Put the rest on the bottom of your library in a random order. Used on 15 cards: Astaphos, Riddle Unspoken, Scheduled Exclusion, Fatal Research, Prophecy of the Sphinx, Veiled Hand Disciple, Scholar of Tomorrows, Astophian Bloodseeker, Astophos's Omenmaster, Astaphos's Revelation, Astaphos's Ward, Momentary Respite, Reverse Domineering, Bite of the Dorky Rat, Vendrez, Dissatisfied Scholar, Silent Diviner

Warcry: Whenever this creature attacks, it gets +1/+0 until end of turn for each other attacking creature Used on 2 cards: Thragian Warfare, Eager 'Ridgeseeker

Thrive: Whenever this creature blocks or becomes blocked, put PARAM1 +1/+1 counters on it. Used on 14 cards: Weathered Packbeast, Young Hydra, Young Bearfighter, Sizable Yearling, Yulosh's Packbeast, Goldcoat Bear, Sturdy Wilderbeast, Ironplated Baloth, Yulosh's Packmaster, Yulonian Seer, Thousand-Tooth Disciple, Sprouting Vine Creeper, Huntermaster of Yule, Woodlands Serpent

Kicker: You may pay an additional PARAM1 to cast this spell. Used on 22 cards: Call to the Angellord, Reinstate, Wingwhelm, Casual Pitfight, Sprout Seeds, Viper's Caress, Thrag Battlemage, Yulosh's Packbeast, Yulonian Battlemage, Incarnation of Lava, Bow Unfaithful, Bursting Confidence, Vyrune's Vanguard, Incite Treachery, Volcanic Residue, Thought Theft, Fiery Death, Willing Decoy, Thistlewood Battlemage, Nature's Ravager, Steady Growth, "Arranged" Match

Soul Bargain: You may have this creature enter the battlefield with PARAM1 +1/+1 counters on it. If you do, you lose 4 life unless you sacrifice a creature when this creature leaves the battlefield. Used on 10 cards: Claw of the Master, Hungry Demonlord, Feeding Wurm, Thistlerix's Ritualist, Cursed Goblin, Cursed Viashino, Prodigy Ocultist, Apprentice of the Dark Arts, Rixwood Reaper, Ravenous Dead

Bloodthirst: If an opponent was dealt damage this turn, this creature enters the battlefield with PARAM1 +1/+1 counters on it. Used on 11 cards: Gorehorn Minotaurs, 'Ridge Guardian Wurm, Thragian Mountaincrasher, Thrag Viashinolord, 'Ridge Seeker Trailblazer, Inspiring War Wurm, Vampire Outcasts, Rathunter Bat, Ambush Aracnid, Goblin Warscout, Venomous Viashino

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}()]".