Texto em português

Quando Fblthp, o Perdido, entrar no campo de batalha, compre um card. Se ele entrou vindo de seu grimório ou foi conjurado do seu grimório, em vez disso, compre dois cards.

Quando Fblthp se tornar alvo de uma mágica, embaralhe Fblthp no grimório de seu dono.

Rulings

There's normally no way to cast Fblthp from your library or to have it enter the battlefield from your library. You'll have to use other effects to find Fblthp for the bonus card draw.2021-03-19
If an effect exiles Fblthp from your library and then lets you cast that card, it's cast from exile, not from your library.2021-03-19
Fblthp's last ability triggers only if it's on the battlefield when it becomes the target of a spell.2021-03-19
Fblthp's last ability resolves before the spell that caused it to trigger. It resolves even if that spell is countered.2021-03-19
If the spell that targets Fblthp has no other targets, it won't resolve (because it no longer has a legal target after Fblthp has gotten totally lost in your library).2021-03-19