Dragon Knight

Trample
Ride Dragon (if you control a creature with steed and this subtype, you may have this creature ride that creature. If you do, combine their power and toughness. Stack them one top of the other. They keep all abilities and their converted mana cost is the converted mana cost of the creature on top. If the top creature were to die, the bottom creature would live and lose the converted mana cost, power, toughness and abilities the other creature had. It would also lose all counters.)