The Swarmlord is a mix of two different mechanics, +1/+1 counters and death triggers
Phoenixes Even though Otharri doesnt reward us specifically for playing a bunch of Phoenix cards, its not a bad idea to throw some Phoenix cards into this deck just to help cover the skies for attacking and blocking
It's a popular and powerful effect, and one I expect Wizards to return to many times over the years
The winners received an exclusive card as their prize: the Pikachu Illustrator
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Likewise, it also works really well in counters decks (like my Hamza, Guardian of Arashin deck), as the cost to prevent your draw will increase as Esper Sentinel gets bigger and bigger, easily making it more costly to pay for than even Rhystic Study