Monumental Henge

Monumental Henge enters tapped unless you control a Plains.
: Add .
, : Look at the top five cards of your library. You may reveal a historic card from among them and put it into your hand. Put the rest on the bottom of your library in a random order. (Artifacts, legendaries, and Sagas are historic.)

Echoes of Eternity

If a triggered ability of a colorless spell you control or another colorless permanent you control triggers, that ability triggers an additional time.
Whenever you cast a colorless spell, copy it. You may choose new targets for the copy. (A copy of a permanent spell becomes a token.)

Clue

, Sacrifice this artifact: Draw a card.

Candlestick

Equipped creature gets +1/+1 and has “Whenever this creature attacks, surveil 2.” (Look at the top two cards of your library, then put any number of them into your graveyard and the rest on top of your library in any order.)
, Sacrifice Candlestick: Draw a card.
Equip

Rope

Equipped creature gets +1/+2, has reach, and can’t be blocked by more than one creature.
, Sacrifice Rope: Draw a card.
Equip

Lead Pipe

Equipped creature gets +2/+0.
Whenever equipped creature dies, each opponent loses 1 life.
, Sacrifice Lead Pipe: Draw a card.
Equip

Wrench

Equipped creature gets +1/+1 and has vigilance and “, : Tap target creature.”
, Sacrifice Wrench: Draw a card.
Equip

Knife

During your turn, equipped creature gets +1/+0 and has first strike.
, Sacrifice Knife: Draw a card.
Equip

The Ancient One

Descend 8 — The Ancient One can’t attack or block unless there are eight or more permanent cards in your graveyard.
: Draw a card, then discard a card. When you discard a card this way, target player mills cards equal to its mana value.