If an opponent would mill one or more cards, they mill twice that many cards instead. (To mill a card, a player puts the top card of their library into their graveyard.)

Landfall — Whenever a land you control enters, target player mills three cards.

Flying This creature gets +4/+4 as long as an opponent has ten or more cards in their graveyard.

Landfall — Whenever a land you control enters, each opponent mills three cards. (To mill a card, a player puts the top card of their library into their graveyard.)

When this enchantment enters, you become the monarch. At the beginning of your upkeep, any number of target players each mill two cards. If you're the monarch, each of those players mills ten cards instead. (To mill a card, a player puts the top card of their library into their graveyard.)

Counter target spell.

Scry 1. (Look at the top card of your library. You may put that card on the bottom.) Draw a card.

Counter target spell. Its controller mills three cards.

{T}, Sacrifice this land: Search your library for a basic land card, put it onto the battlefield tapped, then shuffle.

({T}: Add {U}.)

Return target instant or sorcery card from your graveyard to your hand. Exile Flood of Recollection.