Counter target spell.
At the beginning of your next upkeep, pay . If you don't, you lose the game.

All lands are 1/1 creatures that are still lands.

: Add . This land deals 2 damage to you.

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

Enchant creature
When this Aura enters, if enchanted creature has flying, this Aura deals 2 damage to that creature and this Aura gains "Enchanted creature loses flying."

Whenever a creature you control dies, draw a card.
+1: Create a 2/2 black Zombie creature token.
−4: Each player sacrifices two creatures of their choice.
−9: Each opponent chooses a permanent they control of each permanent type and sacrifices the rest.

All Sliver creatures get +1/+1 for each other Sliver on the battlefield.

If a permanent entering the battlefield causes a triggered ability of a permanent you control to trigger, that ability triggers an additional time.
Warp (You may cast this card from your hand for its warp cost. Exile this creature at the beginning of the next end step, then you may cast it from exile on a later turn.)

: Tear this artifact into pieces. Add four mana of any one color. Remove the pieces from the game.

( can be paid with either or 2 life.)
Counter target spell with mana value 1.

Flying
You can't lose the game and your opponents can't win the game.

: Untap target creature.

Alliance — Whenever another creature you control enters, choose one that hasn't been chosen this turn —
• Add .
• Put a +1/+1 counter on each creature you control.
• Scry 2, then draw a card.

Fading 5 (This enchantment enters with five fade counters on it. At the beginning of your upkeep, remove a fade counter from it. If you can't, sacrifice it.)
Remove a fade counter from this enchantment: Exile target land.
When this enchantment leaves the battlefield, each player returns to the battlefield all cards they own exiled with it.

, Pay 1 life, Sacrifice this land: Search your library for a Swamp or Mountain card, put it onto the battlefield, then shuffle.

, Sacrifice this artifact: Add one mana of any color.

: Add one mana of any color that a land an opponent controls could produce.

As this artifact enters, choose an opponent.
At the beginning of the chosen player's upkeep, this artifact deals X damage to that player, where X is the number of cards in their hand minus 4.

Equipped creature gets +1/+1 and has trample and lifelink.
: Permanents your opponents control lose hexproof and indestructible until end of turn.
Equip

When Titania enters, return target land card from your graveyard to the battlefield.
Whenever a land you control is put into a graveyard from the battlefield, create a 5/3 green Elemental creature token.