Enchant creature, land, or planeswalker
Enchanted permanent is a colorless land with ": Add " and loses all other card types and abilities.

: Add .
, : Add , , or .

If one or more +1/+1 counters would be put on a creature you control, that many plus one +1/+1 counters are put on it instead.

Landfall — Whenever a land you control enters, choose one —
• Create a 2/2 white Cat Beast creature token.
• Put a +1/+1 counter on each creature you control. Those creatures gain vigilance until end of turn.

Lifelink
Devourer of Souls — Whenever another creature dies, put a +1/+1 counter on this creature.

When Lobelia enters, look at the top card of each opponent's library and exile those cards face down.
, Sacrifice an artifact: Choose one —
• Until end of turn, you may play a card exiled with Lobelia without paying its mana cost.
• Each opponent loses 2 life and you gain 2 life.

As The Mimeoplasm enters, you may exile two creature cards from graveyards. If you do, it enters as a copy of one of those cards with a number of additional +1/+1 counters on it equal to the power of the other card.

Search your library for up to two basic land cards, reveal those cards, put one onto the battlefield tapped and the other into your hand, then shuffle.

If you would draw a card while your library has no cards in it, you win the game instead.

Whenever a creature an opponent controls is dealt excess noncombat damage, amass Orcs X, where X is that excess damage. (Put X +1/+1 counters on an Army you control. It's also an Orc. If you don't control an Army, create a 0/0 black Orc Army creature token first.)
: This enchantment deals 7 damage to target creature.

Enchant land
Whenever enchanted land is tapped for mana, its controller adds an additional .

Destroy target artifact you don't control.
Overload (You may cast this spell for its overload cost. If you do, change "target" in its text to "each.")

Lifelink
Adelbert Steiner gets +1/+1 for each Equipment you control.

Swarm of Rats's power is equal to the number of Rats you control.

Reach (This creature can block creatures with flying.)
At the beginning of combat on your turn, put a +1/+1 counter on target creature you control. It gains lifelink until end of turn. (Damage dealt by the creature also causes you to gain that much life.)

: Add .
, : You may put a basic land card from your hand onto the battlefield tapped.

Exile the top five cards of your library. You may play cards exiled this way until the end of your next turn.
You may play an additional land this turn.

Enchant player
As this permanent transforms into Curse of Leeches, attach it to a player.
At the beginning of enchanted player's upkeep, they lose 1 life and you gain 1 life.
Daybound (If a player casts no spells during their own turn, it becomes night next turn.)

Flying
Other Faerie creatures you control get +0/+1.
: Other Faerie creatures you control get +1/+0 until end of turn.

Landfall — Whenever a land you control enters, you may get two rad counters.
: Put target land card in a graveyard that was milled this turn onto the battlefield under your control tapped.