Tyranian Sky Fortress

{2}{t}Deal 4 damage to target creature with flying.
Spectral Laser—{2}{w}{w}{r}{r}: Target up to three creatures with flying. Reveal the top four cards of
your library. X equals the total converted mana
cost of all four cards. If X is greater than the toughness of any targeted creature, destroy that creature. Shuffle the revealed cards back into
your library. Draw a card for each creature
destroyed by spectral laser this turn.