Aikido theme deck.
Ideal combo:
Nearheath Pilgrim + Boros Reckoner/Spiteful Sliver + Volcano Hellion
They are on curve. Give you infinite life and one shot the opponent.
You play T2 Nearheath Pilgrim, T3 Boros Reckoner/Spiteful Sliver, T4 Volcano Hellion. You soulbound the pilgrim with the hellion, chose 1 billion damage, target the reckoner with it, heal for 1 billion, redirect the damage to an opponent and one shot them. The reckoner dies as a consecuence, but you dont care because you already won.
Also, the hellion damages you, but since you already have 1 billion life, you deal 1 billion damage to yourself and you heal it back. Thus, you stay with 1 billion life.
Afterwards, dont pay the echo cost of the hellion and let it die.
Now, if you dont find the three pieces, you can still pull it with two of them (but you always need the hellion):
Nearheath Pilgrim + Volcano Hellion = infinite damage to a creature and infinite life.
Wont win the game at the spot, but it buys you all the time in the world you need to slowly burn the opponent (unless he has an infinite combo deck as well). Specially good in multiplayer games.
Boros Reckoner/Spiteful Sliver + Volcano Hellion = Can one shot the opponent, but you will need to have more life than him by the time you cast the combo. This shouldn't prove too difficult, since you have burn and heal spells in the first turns like Lightning Helix, Lightning Bolt and Vexing Devil.
Another infinite life combo consists of Nearheath Pilgrim + Boros Reckoner or Spiteful Sliver + Boros Charm (selecting indestructibility) + damage. What you do is redirect over and over to themselves the damage the reckoner or mare received. Since they have lifelink and are indestructible, they wont die and you get infinite life.
Finally, a nice synergy between T1 Vexing Devil + T2 Nearheath Pilgrim = swing for 4 and heal 4.