Agra, Dragonsoul

During your turn, Agra, Dragonsoul is a Dragon,
gains flying and haste and has "{r}: Agra,
Dragonsoul gets +1/+0 until end of turn."
Whenever a Dragon you control deals combat
damage to a player, add {w}, {u}, {b} or {g} to your
mana pool during your post-combat main phase.
{w}{u}{b}{r}{g}{t}: Search your library for a Dragon
card, reveal it and put it in your hand. Shuffle
your library afterwards. Activate this ability only
if a Dragon you control dealt combat damage
to a player this turn.