They can include the word mill, put cards into the graveyard, exile cards from your opponents libraries, or similar variations
Ramp your mana in the early turns and then unleash a relentless assault of dragons that your opponents simply cant handle
Trinisphere Trinisphere is another popular lock piece that puts an incredibly punishing tax on cards with highly efficient casting costs (less the mana value three)
Built around the mighty Ghalta, this ready-to-play 100-card Commander deck is designed for players who love massive creatures, explosive attacks, and thrilling multiplayer battles
When you smash face to an opposing player, you can put a dork you exiled on the battlefield under your control, which is likely with its flying, and then you can tap it in future turns to keep up, if your first crew was answered