Trample
From Magic: The Gathering
A creature with Trample can both damage a defending creature and the defending player. When the attacking creature deals combat damage to a defending creature, subtract the defending creature's toughness from the attacking creature's power, and that damage is dealt directly to the defending player. However, the defending player may block the attacking creature with more than one defending creature, and the total of the defending creatures' toughness is subtracted from the attacking creature's power to determine how much damage is dealt to the defending player. this is mainly paired with stronger creatures, like wurms, leviathans, and dragons. Many green and red creatures have this ability.
If you attack with a "trample" creature and the defending player chooses to block with an indestructible creature, the damage still carry over to the controller minus the toughness of the defending creature. An example would be a 1/1 creature token blocking Crash of Rhinos, an 8/4. The 1/1 would take 1 of the damage, while the other 7 damage "trampled" over it onto the player. The only way the defending play wouldn't take any damage would be to block with a single creature or combination of creatures whose toughness would equal 7 or more. Another way is to have a replacement effect that redirects the damage to somewhere else.
