Before the end of your first turn, make sure you've paid the six generic mana to recast Thopter Assembly, as it has to be out at the start of your next turn's upkeep
It's not as good as Impulsive card drawing, it's chaotic, and thus won't trigger a lot of "Kill Now" radars like others
My first thought was to put this in F-tier alongside the other limited-focused removal battles, but I bumped it up to D-tier due to the possibility of looping it with Yorion, Sky Nomad
Ame No Murakumo no Mutsurugi is not just a good Ritual Monster, but one with a sparkling quarter-century look
Greenwarden of Murasa is slower and much less versatile
Its first effect lets you gain 1000 whenever an Aroma is summoned (hello instant Jasmine search), and its second effect lets you Special Summon an Aroma from your deck whenever your opponent declares an attack while you have less LP than them