Because we wanted the "ass" pun in the name and throughout this set to always refers to a Donkey
This can have deadly results

Akroma, Angel of Fury Akroma, Angel of Wrath Akroma, Vision of Ixidor Anya, Merciless Angel Archangel Avacyn Atraxa, Grand Unifier Atraxa, Grand Unifier Atraxa, Praetors' Voice Aurelia, Exemplar of Justice Aurelia, the Law Above Aurelia, the Warleader Aurelia, the Warleader Avacyn, Angel of Hope Avacyn, Guardian Angel Avacyn, the Purifier Basandra, Battle Seraph Brisela, Voice of Nightmares Bruna, Light of Alabaster Bruna, the Fading Light Drana and Linvala Errant and Giada Feather, Radiant Arbiter Feather, the Redeemed Firja, Judge of Valor Gabriel Angelfire Giada, Font of Hope Gisela, Blade of Goldnight Gisela, the Broken Blade Iona, Shield of Emeria Ixhel, Scion of Atraxa Jenara, Asura of War Kasla, the Broken Halo Liesa, Forgotten Archangel Liesa, Shroud of Dusk Linvala, Keeper of Silence Linvala, Shield of Sea Gate Linvala, the Preserver Lulu, Loyal Hollyphant Lyra Dawnbringer Radiant, Archangel Radiant, Serra Archangel Razia, Boros Archangel Regna, the Redeemer Reya Dawnbringer Rienne, Angel of Rebirth Rodolf Duskbringer Selenia, Dark Angel Sephara, Sky's Blade Sephiroth, One-Winged Angel Shalai and Hallar Shalai, Voice of Plenty Sigarda, Champion of Light Sigarda, Font of Blessings Sigarda, Heron's Grace Sigarda, Host of Herons Tariel, Reckoner of Souls Tiana, Ship's Caretaker Zamriel, Seraph of Steel

All our playtests have been done with this in mind, and theyve been very enjoyable. Perhaps the biggest change likely to affect Limited is the simple fact that play boosters only contain 14 playable cards
Felidar Cub
When your nontoken dorks die, a target opponent forces you to either draw a card or drop an equal or lower toughness dork to the battlefield, therefore making this a powerful machine for sacrificing for benefits in Esper rather than the normal home of Orzhov or Golgari