You can only use this effect of "Sunvine Maiden" once per turn
If a targeted permanent is untapped at the time its controller's next untap step begins, this ability has no effect on it
That said, signets are still mostly fine, and playable alongside them if you really need extra rocks
Typically you'll dredge over many cards at once, hitting some combination of Narcomoebas and Prized Amalgams, then your Illusions will trigger and get put onto the battlefield, triggering your amalgams in the graveyard to come back later
There are tons of great poison cards printed over the years, many of which skip over damaging your opponents completely
Bored of daily life and each other, the two pass their time engaging in mutual casual warfare