Search your library for a Plains, Island, Swamp, or Mountain card, put it onto the battlefield tapped, then shuffle.
Landfall — Whenever a land you control enters, exile the top card of your library. You may play that card for as long as it remains exiled. At the beginning of your end step, if there are cards exiled with Valakut Exploration, put them into their owner’s graveyard, then Valakut Exploration deals that much damage to each opponent.
Equipped creature gets +1/+1 for each land you control. Equip legendary creature {3} Equip {7}
Put target artifact or enchantment on the bottom of its owner’s library. // Search target opponent’s library for a card and exile it. You gain life equal to its mana value. Then that player shuffles.
As Meddling Mage enters, choose a nonland card name. Spells with the chosen name can’t be cast. 2/2
Whenever you cast a blue spell, exile the top card of target player’s library. Whenever you cast a black spell, exile the top card of target player’s library. Your opponents can’t cast spells with the same name as a card exiled with Circu, Dimir Lobotomist. 2/3
{1}{U}{B}: Exile target creature card from a graveyard. Dimir Doppelganger becomes a copy of that card, except it has this ability. 0/2
Whenever you cast an artifact spell, you may search your graveyard, hand, and/or library for a card with the same name as that spell and put it onto the battlefield. If you search your library this way, shuffle. 4/4
Consuming Aberration’s power and toughness are each equal to the number of cards in your opponents’ graveyards. Whenever you cast a spell, each opponent reveals cards from the top of their library until they reveal a land card, then puts those cards into their graveyard. */*
Choose a creature type. Draw a card for each permanent you control of that type.
Changeling (This card is every creature type.) Whenever an opponent casts a spell, you may put a +1/+1 counter on this creature. 2/2
Fear (This creature can’t be blocked except by artifact creatures and/or black creatures.) Whenever Shadowmage Infiltrator deals combat damage to a player, you may draw a card. 1/3
{G}{U}, {T}: Double the number of each kind of counter on target artifact, creature, or land. 1/4
Flying Whenever Isperia the Inscrutable deals combat damage to a player, choose a card name. That player reveals their hand. If a card with the chosen name is revealed this way, search your library for a creature card with flying, reveal it, put it into your hand, then shuffle. 3/6
Sulfur Falls enters tapped unless you control an Island or a Mountain. {T}: Add {U} or {R}.