2019-07-12 : A permanent card is an artifact, creature, enchantment, land, or planeswalker card.

2019-07-12 : Because targets are chosen for activated abilities before costs (such as “Sacrifice Salvager of Ruin”) are paid, Salvager of Ruin’s ability can’t target itself.

2019-07-12 : Permanent spells that were countered earlier in the turn never entered the battlefield, so they are not legal targets for Salvager of Ruin’s ability.

2019-07-12 : Salvager of Ruin’s ability can target a permanent card in your graveyard that was put there from the battlefield before Salvager of Ruin entered the battlefield during the same turn.