This is a peasant cube built mainly from cards I already own, Being peasant, the cube is designed to play a little slower and more grindy, similar to retail limited. I did focus on pushing aggro in mono red and white but the other colors don't support a focused aggro deck.
This does include the persist combo in all colors except blue with a sac outlet, a +1/+1 counter giver, and Murderous Redcap or Kitchen Finks. There is also the combo of Scurry Oak or Herd Baloth and Ivy Lane Denizen or Rosie Cotton of South Lane. Both of these combos require multiple creatures and are expensive so they should require at least 2 turns to set up.
The themes are somewhat loose for most of the color pairs to give flexibility.
Azorius - Blink / Flying
Dimir - Self Mill / Control
Rakdos - Sacrifice
Gruul - Ramp / Big Creatures
Selesnia - +1/+1 Counters
Orzhov - Creature Token Sacrifice
Izzet - Spellslinger
Golgari - Graveyard
Boros - Go Wide / Aggro
Simic - Ramp / Landfall