Forced Combat makes opposing creatures attack whether their controllers want them to or not. Goad is the most common version, forcing a creature to attack each combat if able and attack someone other than the player who goaded it if possible.
Fumiko the Lowblood forces opposing creatures into combat, while Bloodthirsty Blade can repeatedly goad whichever creature looks most dangerous. Komainu Battle Armor spreads goad across an opponent's battlefield through combat damage.