Last Dream

Last Dream is a consumable item obtained by using the "Dream" ACT during the fight against Asriel Dreemurr.
When obtained, Last Dreams fill all the inventory's free space. This action can be repeated indefinitely, solidifying the impossibility to lose the fight.
Last Dreams heal 17 HP, but are described in game to heal 12 HP. In contrast, saving an already-saved character during the second half of the Asriel fight heals the protagonist fully.
de:Letzter Traum
es:Last Dream
fr:Dernier Rêve
ja:Last Dream
pl:Last Dream
pt-br:Último Sonho
ru:Последняя мечта
zh:最後夢想