RtR Forum Draft p1p6

[Prophylaxis]

{Mountain}
{Aerial Predation}
{Centaur Healer}
{Sewer Shambler}
{Downsize}
{Giant Growth}
{Chemister's Trick}
{Azorius Guildgate}
{Golgari Keyrune}

Our Deck:

1 {Rakdos's Return}
1 {Annihilating Fire}
1 {Temple Garden}
1 {Spawn of Rix Maadi}
1 {Electrickery}

What do you want to pick next? Which will complement our deck?