cards with trample and lifelink mtg Chromanticore [Born of the Gods] If a creature card with flying was exiled with Soulflayers delve ability Unflinching Courage

An attacking creature that is blocked deals damage to the creature or creatures that are blocking it, and vice versa

After that, all it takes is activating the land card Restless Reef, and you've all but decked your opponent

Edgar, Master Machinist Wizards clearly went out of their way to make Edgar, Master Machinist fair, between the once-per-turn clause and the fact that the artifact it casts enters tapped, but I refuse to believe that we cant crack this like an egg we should probably start with Krark-Clan Ironworks

Some other effects and abilities may also stop creatures from attacking, while others may be forced to attack, so be sure to check the card text

Similarly, the player, planeswalker, or battle it attacked doesn't have to still be in the game or on the battlefield