Cheap infinite combos?

[Kaleo42]

 {Quillspike} + {Devoted Druid}

{Deadeye Navigator} + {Gilded Lotus} + {Pestermite}/ {Deceiver Exarch}/ {Derevi, Empyrial Tactician}

{Hidden Strings} on {Isochron Scepter} + {Gilded Lotus}

{Phyrexian Unlife} + {Melira, Sylvok Outcast}

{Rings of Brighthearth} + {Basalt Monolith}

{Niv-Mizzet, the Firemind} + {Curiosity}

Out of time to think of more.

[Kaleo42]

 {Drogskol Reaver} +  {Horizon Chimera}

{Izzet Guildmage} + {training grounds} + mana producing spell ({manamorphose} or {desperate ritual} for example)

{Bloodchief Ascension}/ {duskmantle guildmage} + {Mindcrank}

{Exquisite Blood} + {Vizkopa Guildmage}/ {Sanguine Bond}

Some more

[Rasser]

 {Orochi Leafcaller}
{Freed from the Real}+ {Zhur-Taa Druid}

[Redrighthand]

 {Axebane Guardian},  {Galvanic Alchemist} and three other defenders.

[Mlerner12]

Might not be cheap neccecarily but {Iona Sheildijg Emeria} name white + {Painters Servant} name white + {Abyssal Persecuter}+{Platnium Angel}

No one leaves.

[Vileo]

Might not be cheap neccecarily but {Iona Sheildijg Emeria} name white + {Painters Servant} name white + {Abyssal Persecuter}+{Platnium Angel}

No one leaves.

That's not an infinite combo, just a board lock...

[Vileo]

More like "Good luck trying to get all your pieces to that combo..."