When Merfolk Surveyor enters the battlefield, explore-clash. If you win the explore-clash, gain 3 life. (To explore-clash, you and an opponent each reveal the top card of your respective libraries. Put any lands revealed this way into their owner's hands. Put a +1/+1 counter on this creature for each nonland card revealed this way. Then, each player who didn't get a nonland puts the card back or into their graveyard. You win the explore-clash if the mana value of your revealed card was higher.)

During deckbuilding, choose a number from one to nine. Write that number in this card's mana cost, power, and toughness.

Whenever a creature an opponent controls dies, create a Treasure token. (It's an artifact with ", Sacrifice this token: Add one mana of any color.")
At the beginning of your upkeep, if you control ten or more Treasures, you win the game.

Target player untaps all basic lands they control.

Reveal a card from your hand. Search your library for a card with the same name as that card, reveal it, put it into your hand, then shuffle.
Hellbent — If you have no cards in hand, instead search your library for a card, put it into your hand, then shuffle.

Destroy target nonblack creature. It can't be regenerated.

Each player chooses a number of permanents they control equal to the number of permanents controlled by the player who controls the fewest, then sacrifices the rest. Each player discards cards the same way.

Add .

Delve (Each card you exile from your graveyard while casting this spell pays for .)
: Mill two cards, then return a nonland card of an opponent's choice from your graveyard to your hand.

Search your library for an instant or sorcery card, reveal it, then shuffle and put that card on top.

Equipped creature has haste and shroud. (It can't be the target of spells or abilities.)
Equip

Whenever a creature enters, that creature's controller may have it deal damage equal to its power to any target of their choice.

When this creature enters, you may return target card from your graveyard to your hand.
When this creature dies, you may exile it. If you do, return target card from your graveyard to your hand.

, : This artifact deals 4 damage to any target.

All creatures have haste.
Players play with the top card of their libraries revealed.
Noninstant, nonsorcery cards on top of a library are on the battlefield under their owner's control in addition to being in that library.

You may cast Aura and Equipment spells as though they had flash.
Whenever an Equipment you control enters, you may attach it to target creature you control.

Whenever an artifact you control is put into a graveyard from the battlefield, if it wasn't sacrificed, you may pay . If you do, draw a card.

Players play a Magic subgame under the table, starting at 5 life and using their libraries as their decks. The winner searches their library for two cards, puts those cards into their hand, then shuffles.

Whenever an opponent casts a creature spell, this enchantment deals 1 damage to that player.

: Add .
, : Add , , or .