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(2) During the Main Phase (Quick Effect): You can remove 1 counter from this card, then activate 1 of these effects

You can see some of the decks on Limitless TCG, and while it is almost never included as a full set, it is often there

Skemfar Avenger allows you to risk overextending because you get to immediately refill your hand and play a handful of creatures the following turn

Mix in lots of little cantrips with some big spells, and you can basically guarantee a never-ending action queue of incoming threats that your opponents will have a nightmare of a time keeping track of

But youll probably find your opponent would prefer to completely banish your characters instead of leaving them with damage left to heal