mtg relentless rats commander deck Vren, the If you nourish them Magic: the Gathering - Relentless

Additionally, upon entering the battlefield, Karrthus's controller gains control of all Dragons on the battlefield, meaning that if another player happens to be using a great Dragon card such as a Goldspan Dragon, that value can be stolen for the Karrthus player

If you have any sacrifice outlet in play, such as Phyrexian Altar, you can then generate card advantage by sacrificing opposing creatures

Let's start with a simple one

While others were amassing their forces, getting combos going, and throwing horrifically powerful beasts at each other, I dutifully worked away at the quest list so no one saw my most powerful move coming an onslaught of Blitzballs from a Walking Ballista

This is a great way to protect an important permanent from removal by bouncing it before it's removed, or to reuse a powerful enter-the-battlefield trigger