These cards are kind of like the Alternate Art Liliana, Dreadhorde General from War of the Spark if you wanted a foil copy, you should have pre-ordered it right away
Since colorless mana is generally going to be easy to generate a fair amount of, you could get this hitting as early as turn 4 quite likely and then use it to develop a game plan
Furthermore, his built-in bounce-to-hand ability offers a method of self-preservation against removal
Pyrohemia + Pestilence Pestilence and its Planar Chaos twin Pyrohemia can split up damage across different turns and deal damage in increments of 1, which matters for damage amplifiers and effects like Ob Nixilis, Captive Kingpin and Ghyrson Starn, Kelermorph
On Difference #1, the example with Ash Blossom, I think its effect is Quick effect that can only activate after SEGOC
(Even if it doesnt end up coming true.) Yu-Gi-Oh