
Spells can't be countered.
Each instant and sorcery card in your graveyard has flashback. The flashback cost is equal to that card's mana cost.
Lier, Disciple of the Drowned has 8 printings, first in Innistrad: Midnight Hunt (2021). EDHREC ranks it #2,193 among Commander cards. It appears most in Shiko and Narset, Unified decks (5,590 on EDHREC). 1 public deck on TCG runs it. It has 12 official rulings.
Deck counts from EDHREC.
Cards that show up in the same decks on EDHREC.