mtg commander hydra deck Zaxara, the Exemplary Tribal X-Spells Magic double the number of +1/+1 counters on each creature you control. How to Build a Hydra

For me to grasp the effect of the card, I pretend it says sacrifice Legion's Initiative to have this effect

Its got convoke, which hopefully makes it a more manageable cost, but it also gives you any card out of your library exiled face down to be played later

Those two legendaries are kindred spirits, though Ghave focuses on sacrificing creatures and Marath lets you deal direct damage

The randomness that comes with opening packs might mean more or less depending on the box, and extra mythics can be pulled in The List and wildcard slots, though at a much lower rate

As for the second scrap, it appears to be a black common from the set that has an unless its controller-type ability