The second card (Angelic Shield) costs one white mana, mana produced by a plains, along with one blue mana, which comes from an island
It removes variance in a way few black spells MTG has printed ever have
This four-mana white sorcery has the effect of returning all aura cards from your graveyard to play
Because Tivit, Seller of Secrets is a late-game play, decks using this commander will typically rely on control and stax cards to stave off opponents in the early game
A brief refresher, as even experienced players tend to have issues with Protection: "Protection from X" means "this card can't be damaged, enchanted, blocked, or targeted by anything that is X." This means a Silver Knight can eternally block a Goblin Goon and can't be hit by Lightning Helix