how many mythics in a collector booster box Mtg The Hobbit Display (12ct) containing untold wonders and mysteries Magic The Gathering Secrets of

take control of it, and if you do, it becomes EARTH

Negate Attack is more of a stalling card, or a way to protect a useful monster for, say, a Synchro Summon or an Xyz Summon next turn

While Svyelun is able to protect itself through its indestructibility, it even offers some coverage for its controller's other merfolk, providing all other merfolk its owner controls with Ward 1

The decklist includes a handful of options to untap it at a lower cost and one way to increase its mana generation, allowing you to keep tapping and untapping until you have as much mana as you'll ever need

Rather than negating monster effects on the field, it instead stops them from being activated from the graveyard

Alternatively, you can pull off an infinite discard combo with Chalk Outline, Skirge Familiar, and Ovalchase Daredevil