In their place are spells that return permanents, usually creatures, to their owner's hand, also known as "bouncing" them
If they have 15 cards or fewer left, this one attack essentially ends the game regardless of the prize count
However, for your combat damage to get through, you will need some protection from your opponents after they have either saved up the mana to blow away some of your Humans or kept some of their poor creatures untapped to block you (even if your creatures can't die because of Goldbug, Humanity's Ally )
It was used for about 4 Gideon + Sorin (one side), and it is also used with Gideon in esper token decks that use Wasteland Securing
Finally, we have a blueprint that shows you can make viable catch-up cards that wont strictly get in the way of you closing the game
This article explains how trample works in MTG covering rules, examples of how it can be used, the best trample cards, trample decks and frequently asked questions about trample