The effect of this card is interesting, and the stats aren't bad, but does this card works ?
lv7 / Machine /Earth / ATK 2500 DEF 1600
By discarding Machine Type monsters whose total Levels are 8 or more, you can Special Summon this card from your hand or Graveyard to your side of the field. When this card is destroyed by battle and sent to the Graveyard, select 1 card your opponent controls and destroy it. When this face-up card becomes the target of your opponent's Effect Monster's effect, look at 1 card in your opponent's hand and discard it.
This may be design to work with the Machiners theme as their boss monster is really nothing but muscles. But looking at this card and the first thing that comes into my mind isn't the Machiners. Its the Ancient Gear.
Lv 8 or above Machine ? Golem and Dragon? Combo this with Gear Town and Ancient Gear Golem comes out like its a Monarch, just bigger. Have a few beaters like Cyber Dragon and Ancient Gear Knight in the deck and it'll be a great Beat Down.
Since this card is still vulnarable to traps, unlike Ancient Gears, having Royal Decree just acts as extra protection.