Warp Talon

Flying, haste
Reserve 2, {2}{b/r}{b/r} ({2}{b/r}{b/r} is the cost to cast
it from reserve.)
When Warp Talon enters the battlefield target creature gets -1/-0 until end of turn. If it was cast
from reserve change the target of target spell to
Warp Talon unless its controller pays {1}.