If you control no monsters in your Main Monster Zone: Target 1 face-up monster on the field; that target is unaffected by card effects this turn, except its own, and if you have 3 or more Spells in your GY, it cannot be destroyed by battle this turn.
This card literally trash until the Extra Monster zone comes to DL. This card will only help your opponents monster till then. This card slot could have been used for almost anything else but they added this to the game? If you really wanted to add a "Sky Striker" card to the game there is so many other choices. This card needed to be released when they brought in the ED zones