This is a great way of repeatedly removing cards from an opponent's graveyard , particularly since you receive some nice bonuses while you do so: whenever a creature card is exiled this way, a +1/+1 counter is put on the Froghemoth, and whenever a noncreature card is exiled this way, you gain one life
If five or more mana was spent to cast that spell, put three +1/+1 counters on this creature instead
You may also choose to apply only part of it (causing an activated ability of a creature you control to cost just less to activate).
Plus, you also get to run the most fun-for-you-but-not-for-them cards, like Archon of Cruelty and Lord of the Void, which warms my evil little heart
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