(If this creature isn't monstrous, put four +1/+1 counters on it and it becomes monstrous.) Once a creature becomes monstrous, it can't become monstrous again
Ajani, Nacatl Pariah Arahbo, Roar of the World Arahbo, the First Fang Balan, Wandering Knight Bast, Panther Goddess Brimaz, Blight of Oreskos Brimaz, King of Oreskos Cait Sith, Fortune Teller Denry Klin, Editor in Chief Falthis, Shadowcat Familiar G'raha Tia G'raha Tia, Scion Reborn Jareth, Leonine Titan Jazal Goldmane Jedit Ojanen Jedit Ojanen of Efrava Jedit Ojanen, Mercenary Jetmir, Nexus of Revels Kaheera, the Orphanguard Kemba, Kha Enduring Kemba, Kha Regent Kimahri, Valiant Guardian Kitt Kanto, Mayhem Diva Kros, Defense Contractor Kutzil, Malamet Exemplar Leori, Sparktouched Hunter Lurrus of the Dream-Den Marisi, Breaker of the Coil Mirri the Cursed Mirri, Cat Warrior Mirri, Weatherlight Duelist Nazahn, Revered Bladesmith Nethroi, Apex of Death Nethroi, Apex of Death Old Hob, Alleycat Blues Phabine, Boss's Confidant Prava of the Steel Legion Purraj of Urborg Qala, Ajani's Pridemate Raksha Golden Cub Rigo, Streetwise Mentor Rin and Seri, Inseparable Roxanne, Starfall Savant Runadi, Behemoth Caller Sally Pride, Lioness Leader Silvar, Devourer of the Free Snapdax, Apex of the Hunt Snapdax, Apex of the Hunt Soul of Windgrace Sovereign Okinec Ahau The Lion-Turtle Tigra, Feline Fury Vadrok, Apex of Thunder Vadrok, Apex of Thunder Wasitora, Nekoru Queen Y'shtola Rhul Y'shtola, Night's Blessed Ygra, Eater of All Zahur, Glory's Past Zar Ojanen, Scion of Efrava
its fast, resilient, and full of value generation
(The same is true for card types that don't appear in most games, like plane or scheme.) You can't choose a subtype, such as creature types like Spider or Hero, artifact types like Treasure or Food, or enchantment types like Aura
