Uber-4 Gem Boxes now commonly contain Epic Gems, uncommonly contain Relic Gems, and rarely contain Shadow Gems
Suspended Sentence Suspended Sentence uses suspend, vanishing, and time counters along with Paradox Haze to give you two upkeeps
Silver Tempest does not have large collector boxes at the time of writing, but it is likely booster packs will feature in future collections
Trident Launcher Link 3 EARTH Machine Link Effect Monster ATK 2200 Links: Bottom Left, Bottom, Bottom Right Materials: 2+ Effect Monsters, including a T.G. Tuner You can only use this card names (1) effect once per turn
Usually, its printed on some big Eldrazi that needs to attack, and even then you usually only get one or two sacrifices off it
1 Coiling Oracle