While on the battlefield, a Room's characteristics are a combination of the characteristics of its unlocked doors
If you want to get a better version of this card , prepare to dig a bit deeper into your pockets
Then when it ETBs, everyone loses life equal to their nonbasics land count, just one this time
If some of the targets become illegal, the original division of prevention effects still applies, but the effects that would have been created for illegal targets aren't created at all
Also, watch out for Apophis Decks, which make effective use of Traps that become Monster Cards when activated! Ravenous Invasive Flora Voracious fangs dripping with venom rip apart any prey they ensnare
The trick is to have discard outlets like Faithless Looting coupled with madness cards and flashback cards