Some attackers may have the keyword Unblockable, which means they cannot be blocked, while defenders may have abilities that force them to block or stop them from blocking
, : You may play the exiled card without paying its mana cost if you attacked with three or more creatures this turn
Turning your opponents' lands into Islands is another way you'll be able to swing in for combat damage, with Master of the Pearl TridentMaster of the Pearl Trident, Stonybrook BanneretStonybrook Banneret, and Cold-Eyed SelkieCold-Eyed Selkie
Olivia, Opulent Outlaw, one of the best outlaw commanders, flippantly creates Treasure tokens and gives you a pretty hefty way to use them
She can immediately end games with a 3-lore quest, or completely dismantle boards full of characters that your opponent needs to keep ready for defense
This is on my Commanders to kill-on-sight list