Goblin Dragonrider

Goblin Dragonrider costs {2}{r} less to cast as long as you control a Dragon.
While you do not control a Dragon, Goblin Dragonrider can't attack or block.
While you control a Dragon, Goblin Dragonrider becomes a copy of target Dragon you control, except it's a 2/2 red Goblin Wizard.
If a Dragon you control is destroyed, sacrificed or exiled while you control Goblin Dragonrider, sacrifice it if you control no more Dragons.
Using his own power legitimately is so overrated.