Mana Geyser

Add for each tapped land your opponents control.

Fierce Guardianship

If you control a commander, you may cast this spell without paying its mana cost.
Counter target noncreature spell.

Delayed Blast Fireball

Delayed Blast Fireball deals 2 damage to each opponent and each creature they control. If this spell was cast from exile, it deals 5 damage to each opponent and each creature they control instead.
Foretell (During your turn, you may pay and exile this card from your hand face down. Cast it on a later turn for its foretell cost.)

Solve the Equation

Search your library for an instant or sorcery card, reveal it, put it into your hand, then shuffle.

Karn, the Great Creator

Activated abilities of artifacts your opponents control can’t be activated.
+1: Until your next turn, up to one target noncreature artifact becomes an artifact creature with power and toughness each equal to its mana value.
−2: You may reveal an artifact card you own from outside the game or choose a face-up artifact card you own in exile. Put that card into your hand.

Sanitation Automaton

When Sanitation Automaton enters, surveil 1. (Look at the top card of your library. You may put it into your graveyard.)

Clue

, Sacrifice this artifact: Draw a card.

Crash of Rhino Beetles

Trample
Crash of Rhino Beetles gets +10/+10 as long as you control ten or more lands.

Quarry Beetle

When Quarry Beetle enters, you may return target land card from your graveyard to the battlefield.

Deathbloom Thallid

When Deathbloom Thallid dies, create a 1/1 green Saproling creature token.

Vegetation Abomination

Deathtouch
, Sacrifice Vegetation Abomination: Roll a six-sided die. You gain life equal to the result.

Handy Dandy Clone Machine

, : Create a 2/2 colorless Homunculus creature token. It must be represented by a unique hand and two fingers at all times, or it ceases to exist.

Animate Graveyard

Enchant your graveyard
Enchanted graveyard is a creature on the battlefield with base power and toughness each equal to the number of cards in it. It has the text boxes of all creature cards in it. It’s still a graveyard.
If enchanted graveyard would leave the battlefield, instead exile Animate Graveyard.

Goblin Cruciverbalist

Haste
When Goblin Cruciverbalist enters, create a colorless artifact token named your choice of A, E, I, O, or U.
Whenever Goblin Cruciverbalist attacks, using the first letters of the names of permanents you control, spell a word you haven’t spelled this game. It gets +1/+0 until end of turn for each letter in that word.

Flavor Judge

: Choose target spell or ability that targets a permanent you control. Then ask a person outside the game if the story of what will happen makes sense. If they say no, sacrifice Flavor Judge and counter that spell or ability.

Three-Headed Goblin

Triple strike (This creature deals first-strike, regular, and last-strike combat damage.)

Swinging Ship

Visit — After the first combat phase this turn, there’s an additional combat phase. At the beginning of that combat, untap all creatures that attacked this turn.

Main Event Horizon

As an additional cost to cast this spell, choose A through M or N through Z.
Destroy each creature whose name begins with a letter in the chosen range.

Vegetation Abomination

Deathtouch
, Sacrifice Vegetation Abomination: Roll a six-sided die. You gain life equal to the result.

How Is This a Par Three?!

Whenever you cast a spell, you may have target player mill X cards, where X is the number of words in that spell’s name.

Goblin Cruciverbalist

Haste
When Goblin Cruciverbalist enters, create a colorless artifact token named your choice of A, E, I, O, or U.
Whenever Goblin Cruciverbalist attacks, using the first letters of the names of permanents you control, spell a word you haven’t spelled this game. It gets +1/+0 until end of turn for each letter in that word.