Night's Whisper

Sacred Foundry

({T}: Add {R} or {W}.)
As Sacred Foundry enters, you may pay 2 life. If you don't, it enters tapped.

({T}: Add {B} or {R}.)
As Blood Crypt enters, you may pay 2 life. If you don't, it enters tapped.

Each non-Vampire creature gets -X/-X until end of turn, where X is the number of Vampires you control.

Whenever an opponent loses life, you gain that much life.

Search your library for a card, put that card into your hand, then shuffle.

Vault of Champions enters tapped unless you have two or more opponents.
{T}: Add {W} or {B}.

Each land is a Swamp in addition to its other land types.

{T}, Pay 1 life, Sacrifice Bloodstained Mire: Search your library for a Swamp or Mountain card, put it onto the battlefield, then shuffle.

({T}: Add {R}, {W}, or {B}.)
Savai Triome enters tapped.
Cycling {3} ({3}, Discard this card: Draw a card.)

({T}: Add {W} or {B}.)
As Godless Shrine enters, you may pay 2 life. If you don't, it enters tapped.