For example, take a White aggressive deck built around cheap creatures with tempo-disruption abilities attached like Thalia, Guardian of Thraben, Imposing Sovereign, Containment Priest, and Aven Mindcensor
Token Effort Spider-Ham, Peter-Porker only gives a small buff, but since he gives it to just about all of your creatures, you should cast or make as many creatures as possible in order to get the biggest benefit
Ive killed and been killed on the second turn more times than Id thought possible
Credit: Wizards of the Coast Rodolf Duskbringer FromTheShire: He doesn't let you combo off, but Rodolf will do some powerful and annoying stuff, even if he's just in an aristocrats shell
The attack/enters trigger provides a ton of value by dumping free dragons into play, and you can easily wring additional triggers via flicker effects and extra combats