As long as you aren't running a Stax deck that is actively limiting your opponents from casting multiple spells per turn with cards like Winter Orb I think you'll get enough value out of Mangara to justify its slot
Squawkabilly ex s Squawk and Seize is the perfect Squawkability to get a deck desperate for early draw (and early discards) moving
You have Birthing Pod for artifacts tacked onto a 4/4 flying haste
A scheme deck like this can also be used to cripple opponents in conjunction with draw-limiting effects like Notion Thief or Narset, Parter of Veils
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Mega Charizard X is the most expensive Inferno X card by a wide margin, falling shy of four-digit territory but still standing out as the most valuable card by an almost $300 margin