Whenever a creature you control deals combat damage to a player, choose one —
• Goad target creature that player controls.
• Exile the top card of that player's library. Until end of turn, you may cast that card and you may spend mana as though it were mana of any color to cast that spell.
Grenzo is an aggressive, go-wide red goad/group-slug commander that wants many small creatures connecting with multiple opponents each combat. Every hit triggers a choice: goad to point enemy creatures elsewhere and protect yourself, or steal the top card of their library to fuel value and ramp via any-color casting. You snowball board presence and resources while opponents brawl among themselves, then close with overwhelming combat damage or stolen game-enders.
Generates massive card advantage in mono-red by exiling and casting opponents' top cards, including off-color bombs
Goad keeps you safe by turning opponents' creatures against each other, advancing politics and pillow-fort defense
Cheap 2-mana commander that's easy to recast and gets value from any creature, not just big threats
Rewards wide, evasive, or many-bodied boards with multiplicative triggers across three opponents
Triggers require connecting in combat, so board wipes and strong blockers stall the engine
Mono-red lacks card draw, ramp, and interaction outside the Grenzo theft engine
Stolen cards must be cast the same turn, so excess mana is needed to capitalize
Weak to creature removal on Grenzo himself before you build a board
A reliable sacrifice outlet and finisher that converts your wide board into direct damage.
Prioritize evasion and unblockable enablers (Bedlam, Reconnaissance, Sword suite) so triggers reliably fire, plus haste and extra-combat effects like Aggravated Assault to multiply theft. Add red's best ramp and rituals (Dockside Extortionist, treasure makers) to actually cast the cards you steal each turn, and tighten with mass token producers and a sacrifice-based combo finish such as Goblin Bombardment plus Krenko. Fast mana like Jeska's Will and Mana Geyser pushes the steal engine into explosive turns.