Opponents still lose life if you can't gain life
Licensing and the First Sale Doctrine Yes
This is why lands which enter tapped are written with a replacement effect instead of a triggered ability: if they came in untapped and then became tapped a moment later due to a trigger, there would still be a window where players could tap them from mana and negate this drawback
Optimus Prime, Hero #27 Shattered Glass Universes Beyond x Transformers Change Version Optimus Prime, Hero Legendary Artifact Creature Robot More Than Meets the Eye (You may cast this card converted for .) At the beginning of each end step, bolster 1
This recursive effect is critical for any white deck to accrue value and keep up with the rest of the table
If the opponent choose to Special Summon a Purrely monster from deck, then the discarded card would be banished, so Shaddoll Beast , Broww, Huntsman of Dark World or Rainbow Bridge of Salvation would not be able to activate their effects