Short answer first, then the reasoning — that is how rules questions deserve to be answered, in plain English and from real card text. The ...
Short answer first, then the reasoning — that is how rules questions deserve to be answered, in plain English and from real card text.
The short answer
Trample changes how an attacking creature assigns combat damage. Without trample, an attacker blocked by one creature must assign all its damage to blockers. With trample, the attacker only has to assign lethal damage to each blocker — normally damage equal to its toughness, or any amount from a source with deathtouch — and may assign the rest to the player or planeswalker being attacked. Lethal is judged ignoring damage already marked and ignoring abilities that would prevent or redirect it, which produces the famous corner cases: a huge trampler blocked by a small indestructible creature still tramples over for the difference, because lethal is about the toughness number, not about whether the creature actually dies. If your attacker is unblocked, trample changes nothing — all its damage goes to the defender as usual.
A real card, for reference
Loxodon Warhammer (mana cost {3}; Artifact — Equipment; rarity: rare; most recent printing listed by Scryfall: Commander 2021):
Equipped creature gets +3/+0 and has trample and lifelink.
Equip {3}
Keep the reference card's wording in mind when you apply the explanation above — in Magic, the exact printed text of the cards involved always outranks any general summary, including this one. When a table disagrees, read the cards aloud, apply the explanation step by step, and you will reach the right answer almost every time.
Build and check your list with the MTGBrew Learn guides, and browse every card mentioned here in the MTGBrew card database on MTGBrew.
If this topic is on your bench, keep going with Drannith Magistrate in Commander: What It Does and Which Decks Want It — it covers the neighbouring decisions from a different angle, and the two pieces together give you a fuller picture than either one alone.
Keep reading
Keep reading: Drannith Magistrate in Commander: What It Does and Which Decks Want It and Precon Upgrade Guide: Prosper, Tome-Bound — What to Cut, What to Add, by Role.
Keep building on it
Every slot should argue for itself against the card it replaced. Test a new inclusion through the deck's normal sequence — early development, mid-game pressure, late-game closing — and notice where it helps and where it sits dead. Cards that only shine in the best case are the first cuts when a proven role-player needs the slot back.
COMMENTS