Upgraded Twin

[Taysby]

Courtesy of Channel Fireball's Facebook page for this one
{faerie imposter}
{kiora's follower}
{intruder alarm}
{flameshadow conjuring} origins card. 3R enchantment.  when a creature etb, if you pay R, get a token copy of it
{izzet boilerworks}

tap boilerworks for UR, (having follower, alarm, and conjuring already out) use it to play faerie, paying the r to get a copy.  in response to the 2 untap triggers, make some mana with kiora's ffollower.  return the physical faerie to your hand (because of the tokens clause), repeat for infinite creatures.

[Falcon182]

5 card infinite combo for the win!

[InfinitiveDivinity]

Courtesy of Channel Fireball's Facebook page for this one
{faerie imposter}
{kiora's follower}
{intruder alarm}
{flameshadow conjuring} origins card. 3R enchantment.  when a creature etb, if you pay R, get a token copy of it
{izzet boilerworks}

tap boilerworks for UR, (having follower, alarm, and conjuring already out) use it to play faerie, paying the r to get a copy.  in response to the 2 untap triggers, make some mana with kiora's ffollower.  return the physical faerie to your hand (because of the tokens clause), repeat for infinite creatures.

What, they want to put that into a Twin Shell? Because there are way to many moving parts there. I'm not a fan of a 5 card combo.