Before drawing your hand, you may start the game with Rift in your opening hand. If you do, draw one fewer card. (Mulligans continue as normal.) Rift enters tapped. {T}: Add {C}.
2019-11-12
If you take a mulligan, you don't shuffle Rift into your library. You draw six cards instead of seven, then the mulligan procedure continues as normal.
2019-11-12
You may put Rift into your hand before shuffling the other cards in your deck to become your library. If you do, you draw six cards instead of seven while drawing your opening hand and while taking mulligans. Your maximum hand size is still seven.