Xefion, Undead Titan

When Xefion attacks, if you control a {b} mana, exile it, then search your library for a
creature with power and toughness of 4 or more. Exile that creature, then, for each
creature with power
and toughness of 4 or more, Xefion gets +3/+3 until end of turn.
———{line}{line}{line}{line}{line}{line}{line}{line}{line}{line}{line}{line}{line}{line}
"Life is not real, but death is too.