Okay, Pendragon card is a little bit better than Odd-Eyes Saber Dragon.  Since you can send just about any Dragon or Fiend monster (rather than a specific one that's bad).  
 
Of course, it can't send from the deck like OESD.  If only it did, this could would be great.  With a discard, you can destroy a spell/trap card and the card becomes 3100 ATK.  And unlike OESD, this effect happens in the Main Phase (sooner than the Battle Phase), clearing the way an effect.
 
Everything about this card is advantage-neutral but it's probably a decent choice for a newer player with a small collection (if they have the Fiends and Dragons for it).  But monsters get a lot better than this.
 
1.5/5

D/D/D Dragon King Pendragon...these cards have some cool lore behind them.  Much in the way many Gladiator Beasts are named after heroes and warriors from History, these cards are named after military commanders.  This card looks like fun, but I'm just not sold on him being good enough.  2600-2400 isn't great for a  Level 7, we like our Level 7 Monsters to be 2800 or higher.  Dark and Fiend are obviously very good together.  The Special Summon condition is neat I suppose, but you're still Tributing two Monsters, so I'm not sure why you'd use the effect for that.  His 1-for-1 is balanced though.  Discarding a card to destroy a card on the Field of your opponent is cool, and the 500 attack is honestly negligible, BUT 2600 to 3100 might not be so small.  It only lasts for the turn, which I don't like, but is fair and adds a little more balance.  I wouldn't mind seeing this guy in Fiend, but I don't think he supports Dragons well enough for them.
 
Rating:  2.75/5

Hello Pojo Fans,
 
D/D/D Dragon King Pendragon could see some play coming up when the new “Red-Eyes” support comes out. Like yesterdays card, this monster can be Special Summoned using a monster on the field and something in your hand or side of the field. A small ATK boost isn't much, what matters is the s/t destruction that comes with it. 1 for 1 off the effect, you could actually plus if the card you sent to the grave gave you something in return (like “Burning Abyss” monsters).
 
The hybrid deck to run this right now is Dragon/Fiend, and Burning Abyss should be the immediate selection for Fiend-Type monsters. Hieratics are an ideal Dragon-Type choice as they will give you something off of the tribute to Special Summon this monster. Burning Abyss cards will help you plus off its effect, but this effect could be even better had it been “tribute 1 monster” rather than “discard 1 card”. Regardless, a nifty Chaos Build using Hieratics and Burning Abyss is available with this monster, and you could potentially get multiple copies of D/D/D onto the field in a turn.
 
D/D/D Dragon King Pendragon is a better monster than Odd Eyes Saber Dragon. It has potential behind it, the ability to make a build around it right now (as well as in the future), and easier effect activation,
 
Advanced-3/5
Art-3.5/5
 
Until Next Time
KingofLullaby