Leviathan (from Final Fantasy 15): Presented as a Saga creature, reflecting its temporary yet powerful summon nature in Final Fantasy, a mechanic perfectly fused with Magic: The Gathering
Assuming you play Keene turn 4, and attack turn 5, thats a decent chance of finding a Gate
You choose whether each token is attacking the player or a planeswalker they control as the token is created
END STEP Those are my thoughts on the Manifest Dread mechanic for Duskmourn Limited
Better yet, casting two or more non-creature spells (which you'll likely be doing already anyway) gives Lyse Hext double strike, meaning you'll be dealing double damage with any attacks on top of whatever effects come from the non-creature spells you've been casting (which, again, are cheaper thanks to Lyse Hext's signature ability)
Exile Once More with Feeling