Example : Academy Ruins used in conjunction with Triskelavus challenges a control deck with the difficult task of having to deal with big creatures not just as their opponent draws them, but every single turn
The only downside is that, since it is dependent on lowering the toughness, it might not be able to take down some very big creatures your opponent might control
Lastly, it also makes 004-029 a nice inclusion, either as a synergistic card, or just to open a turn we would lore with everything, and limit our opponent's ability to challenge us on their turn
Based on this limited set, if I was 14, I would definitely rank the Dragon deck No.1
Creature - Archer Orc Color tag templates(None) Phyrexian Metamorph ( can be paid with either or 2 life.) You may have this creature enter as a copy of any artifact or creature on the battlefield, except it's an artifact in addition to its other types