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'Sacrifice a creature: Add one mana of any color.
'Flying
{T}, Sacrifice this creature: Target creature gets -2/-2 until end of turn.
'When this creature enters, you draw two cards and you lose 2 life.
'Whenever a creature you control dies, scry 1. (Look at the top card of your library. You may put that card on the bottom.)
Whenever a nontoken creature you control dies, you gain 1 life. Then you may draw a card. If you do, discard a card. {2}, {T}, Sacrifice this artifact: Search your...
'When this creature enters, you draw two cards and you lose 2 life.
'Flying
{B}: This creature gets +1/+0 until end of turn. Activate no more than twice each turn.
'{T}: Add {C}.
{T}, Sacrifice a creature: Add {B}{B}.
'When this creature enters, return target creature card from your graveyard to the battlefield. You lose life equal to that card's mana value.
'{TK}{TK} — Whenever this creature attacks, you get {TK}. {TK}{TK}{TK} — Undying (When this creature dies, if it had no +1/+1 counters on it, return it to the battlefield under...
'When this creature enters, you draw two cards and you lose 2 life.
'Kicker—Pay 3 life. (You may pay 3 life in addition to any other costs as you cast this spell.) If this creature was kicked, it enters with two +1/+1 counters...