Lightning mob

[Deathseide]

T1: play a {forest} and a {lotus petal},  use the {lotus petal} to play {dark ritual}, and use 1 of that to play a second {dark ritual}, then tap the forest for a {collective voyage}, search for 5 lands and play tapped.
T2: now having 6 available mana, use 3 to play an {ashnod's altar}, and the other 3 to play a {lightning coils}.
T3: play a {myr retriever} and sacrifice it for 2 mana, using it's ability to return the {lotus petal} to your hand and replay. Use the mana from that to play a second {myr retriever}.

Continue sacrificing, retrieving and replaying the two myrs, each time adding a counter to the {lightning coils}, when you have enough, end your turn.
On your next turn, the coils activate and you now have a horde of 3/1 lightning elementals with haste.

[MementoMori]

Um.  {Myr Retriever} costs two, not one. Am I missing something?

[Deathseide]

Um.  {Myr Retriever} costs two, not one. Am I missing something?

Grr... Sorry bout that, had glanced at the card and must have misread the cost

[Deathseide]

Bump and modified to work