mtg sliver card draw Magic the Gathering artist proof sketch of Creature by artist Jeff Miracola This explains why the goblins remain unaffected Mnemonic Sliver Price | mtg

And if we were to imagine todays format

If my opponent responds to the trigger by activating their Relic of Progenitus, then I can respond to that activation by fetching up a land to re-trigger the Bloodghasts

The second ability Morph got enough attention thus far

These tend to be on the more chaotic side of things, but their unpredictability can often lead to wild games

It is intended to be played by two players who each take two of the mono-colored decks and shuffle them together, creating two 60-card, two-color decks, and will release in local game stores, mass market stores, and online stores on Leap Day, February 29, 2020

This will include additional events prior to the Continental Championships." Further details on these additional events will be released at a later time