Sphere of Safety

Creatures can't attack you or planeswalkers you control unless their controller pays {X} for each of those creatures, where X is the number of enchantments you control.

Epic Struggle

At the beginning of your upkeep, if you control twenty or more creatures, you win the game.

Plains

Sigil of the Empty Throne

Whenever you cast an enchantment spell, create a 4/4 white Angel creature token with flying.

Ivory Mask

You have shroud. (You can't be the target of spells or abilities.)

Argothian Enchantress

Shroud (This creature can't be the target of spells or abilities.)
Whenever you cast an enchantment spell, draw a card.

Words of Worship

{1}: The next time you would draw a card this turn, you gain 5 life instead.

Squirrel Nest

Enchant land
Enchanted land has "{T}: Create a 1/1 green Squirrel creature token."

Serra's Sanctum

{T}: Add {W} for each enchantment you control.

Aura Shards

Whenever a creature enters the battlefield under your control, you may destroy target artifact or enchantment.

Ghostly Prison

Creatures can't attack you unless their controller pays {2} for each creature they control that's attacking you.

Sterling Grove

Other enchantments you control have shroud. (They can't be the targets of spells or abilities.)
{1}, Sacrifice Sterling Grove: Search your library for an enchantment card, reveal it, then shuffle and put that card on top.

Replenish

Return all enchantment cards from your graveyard to the battlefield. (Auras with nothing to enchant remain in your graveyard.)

Herald of the Pantheon

Enchantment spells you cast cost {1} less to cast.
Whenever you cast an enchantment spell, you gain 1 life.

Ajani's Chosen

Whenever an enchantment enters the battlefield under your control, create a 2/2 white Cat creature token. If that enchantment is an Aura, you may attach it to the token.

Worship

If you control a creature, damage that would reduce your life total to less than 1 reduces it to 1 instead.

Forest

Enchantress's Presence

Whenever you cast an enchantment spell, draw a card.

Savannah

Privileged Position

({G/W} can be paid with either {G} or {W}.)
Other permanents you control have hexproof. (They can't be the targets of spells or abilities your opponents control.)

Anointed Procession

If an effect would create one or more tokens under your control, it creates twice that many of those tokens instead.