Knight

Human Soldier

(This creature is affected by summoning sickness, and it has "{T}: Add {G}.")

Toxic 1 (Players dealt combat damage by this creature also get a poison counter.)
This creature can't block.

Lifelink (Damage dealt by this creature also causes you to gain that much life.)

Training (Whenever this creature attacks with another creature with greater power, put a +1/+1 counter on this creature.)