Whether you're finding removal, card draw, or finishers, this spell fills every role at once
Now tap this for Black too
I imagine you reach for blues many Thopter generators since small flying bodies are the perfect recipients for a large buff
The Outlast mechanic is pretty simple: it's a keyword activated ability that lets a creature gain a +1/+1 counter when we pay its cost
Myrkul, Lord of Bones (Check it out here) was built as the leader of a Midrange and Constellation deck that ran a bunch of dorks with ETB abilities for value (like Liliana's Specter and Archon of Cruelty), sacrificed them for value (High Market and Dockside Chef), netted a return as an enchantment to trigger another ETB for it and constellation dorks (like Underworld Coinsmith and Eidolon of Blossoms) and then added in some ramp, answers, card flow, and called it a deck
Thats usually how Triumph of the Hordes plays