Glass-Cast Heart - [Foil] Crimson Vow Commander (VOC) EMN you may cast target instant

you may cast target instant or sorcery card with mana value less than or equal to Dreadhorde Arcanist's power from your graveyard without paying its mana cost

Many horrors take the bait of brave elf volunteers walking alone

Creature cards exiled this way gain "You may cast this card from exile as long as you control a Lukka planeswalker

then discards a card

each gets +2/+2

Glass-Cast Heart - [Foil] Crimson Vow Commander (VOC) EMN you may cast target instantWhenever one or more Vampires you control attack, create a Blood token. (It's an artifact with "{1}, {T}, Discard a card, Sacrifice this artifact: Draw a card.") {B}, {T}, Pay 1 life: Create a 1 1 white and black Vampire creature token with lifelink. {B}{B, {T}, Sacrifice Glass Cast Heart and thirteen Blood tokens: Each opponent loses 13 life and you gain 13 life.