13 Neheb, The Eternal You're Getting Mana No Matter What Despite Neheb, The Eternal's burn effect being secondary to its mana-generating ability, it's still a great way to pick at your opponents as you ramp your way to more substantial damage
Depending on the deck, he can bring him to an annihilated state with just the P effect, but if you use it as a monster, a dedicated construction will be essential
If they sacrifice it in response, theres no longer a target, and Callous Dismissal is countered
These two outermost Spell and Trap Zones are considered Pendulum Zones when Pendulum Cards are in play in those zones
There are ways to counter this playstyle, such as destruction spells and creatures with reach
Getting rid of all creatures is one thing, but also trashing all mana rocks, and potentially other important artifacts is too powerful to ignore