It can act as removal or just a bit of direct damage on your second turn, then its a big creature for only 3 mana on turn 3
In a multiplayer game, if a player leaves the game, all cards that player owns leave as well
Thunderbreak Regent Thundermane Dragon Thundermaw Hellkite Tiamat Tiamat's Fanatics Twinflame Tyrant Two-Headed Dragon Two-Headed Hellkite Tyrant of Kher Ridges Tyrant of Valakut Tyrant's Familiar Ureni of the Unwritten Ureni, the Song Unending Utvara Hellkite Vaevictis Asmadi Vaevictis Asmadi, the Dire Vampiric Dragon Velomachus Lorehold Velukan Dragon Vengeful Ancestor Verix Bladewing Viashivan Dragon Volcanic Dragon Voracious Dragon Vrondiss, Rage of Ancients Warmonger Hellkite Wasitora, Nekoru Queen Worldgorger Dragon Wrathful Red Dragon Young Red Dragon Ziatora, the Incinerator Zodiac Dragon Zurgo and Ojutai
Considering the current price point on these (which I'll discuss below), this is a pretty good bargain, given that set boosters are included
With plenty of effects to flicker your own creatures at instant speed, you can keep triggering her abilities on your opponents turns over and over again for tons of value
Mangara is also a Cleric, so a Cleric Tribal deck like Ayli, Eternal Pilgrim