mtg card resolution Building the Perfect Commander Deck Card - MTG Wiki

For example, Jet, Rebel Leader gives you a creature that is very capable of helping you get even more Rebels on the board and Sally Pride can give you a bunch of tokens and gives you a mass buff effect when she attacks

Its mechanics tie directly into Tolkiens world: The Ring Tempts You gives your Ring-bearer mounting boons over time, while amassing Orcs floods the board with an Orc army

So, you know by now that you should choose a wrath to suit your deck

Her planeswalker side will do everything you want in the Undead Unleashed

While you could certainly just play Krrik fair as one of the 99 in a mono-black deck as a way to occasionally cast spells ahead of time, this legend shines in a deck built to truly abuse it

This is much better as a precise response to a specific card, but it only triggers just once when it enters the battlefield, whereas Relic of Progenitus can be activated every turn