Swap it and Cover of Darkness out for some generic fear and menace-causing spells like Aphotic Wisps or Dance of Shadows
It doesnt double your sacrifice triggers like Mirkwood Bats and Juri, Master of the Revue
His ability is a single, glorious line, whenever you cast an instant or sorcery, you make a 2/2 flying Drake
Both Hollow Marauder and Huskburster Swarm are staples in the deck, and both do very well with an extra +5/+5 or so on top
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Because of this information, Jon was able to beat Mageta the Lion by making tight decisions in a truly wonderful display of knowledge and skill over raw power