A great example is a deck I profiled last year, Joel Micks Alpha Elves. At its essence, this deck is just three unique cards: Forests, Llanowar Elves, and Giant Growths
Creature - Scout Merfolk Counters (CTRL to add secondary) Draw Svyelun of Sea and Sky Svyelun has indestructible as long as you control at least two other Merfolk
The best I could come up with for locking opponents out of a Commander game with Glorious End requires getting a Glorious End exiled with Elite Arcanist along with a Paradox Engine on the battlefield
Illustrated by Deruchenko Alexander Standard Not Legal Alchemy Not Legal Pioneer Not Legal Historic Not Legal Modern Legal Brawl Not Legal Legacy Legal Comp
An ideal game start for Boros Convoke is to play out a Novice Inspector (or a Voldaren Epicure, a red one-drop that creates a Blood token when it enters the battlefield) on turn one, then on turn two cast Gleeful Demolition to turn that token into three goblins
This can often draw two or three cards per rotation if you can generate tokens on your opponents turns