You have hexproof. (You can't be the target of spells or abilities your opponents control.)

Enchant creature

Enchanted creature gets +1/+1 for each artifact and/or enchantment you control.

Lifelink

{1}, Sacrifice Alseid of Life's Bounty: Target creature or enchantment you control gains protection from the color of your choice until end of turn.

Enchant creature

When Angelic Gift enters the battlefield, draw a card.

Enchanted creature has flying.

Flash

Enchant creature

As Benevolent Blessing enters the battlefield, choose a color.

Enchanted creature has protection from the chosen color. This effect doesn't remove Auras and Equipment you control that are already attached to it.

Sacrifice Benevolent Bodyguard: Target creature you control gains protection from the color of your choice until end of turn.

Target permanent gains hexproof and indestructible until end of turn. If it's an artifact creature, it gets +2/+2 until end of turn.

Enchant creature you control

When Cartouche of Solidarity enters the battlefield, create a 1/1 white Warrior creature token with vigilance.

Enchanted creature gets +1/+1 and has first strike.

Flash

Enchant creature

As Cho-Manno's Blessing enters the battlefield, choose a color.

Enchanted creature has protection from the chosen color. This effect doesn't remove Cho-Manno's Blessing.

Enchant creature

Enchanted creature gets +1/+3.

{W}: Return Conviction to its owner's hand.

When Court of Grace enters the battlefield, you become the monarch.

At the beginning of your upkeep, create a 1/1 white Spirit creature token with flying. If you're the monarch, create a 4/4 white Angel creature token with flying instead.

Enchant player

As Curse of Silence enters the battlefield, choose a card name.

Spells with the chosen name enchanted player casts cost {2} more to cast.

Whenever enchanted player casts a spell with the chosen name, you may sacrifice Curse of Silence. If you do, draw a card.

Enchant creature

Enchanted creature is an Insect artifact creature with base power and toughness 0/1 and has indestructible, and it loses all other abilities, card types, and creature types.

Enchant creature with another Aura attached to it

Enchanted creature gets +3/+3 and has first strike, vigilance, and lifelink. (Damage dealt by the creature also causes its controller to gain that much life.)

{T}: Add {W}.

{W}, {T}: Prevent the next 2 damage that would be dealt to target legendary creature this turn.

{T}: Add {W}.

Channel -- {2}{W}, Discard Eiganjo, Seat of the Empire: It deals 4 damage to target attacking or blocking creature. This ability costs {1} less to activate for each legendary creature you control.

Whenever an opponent casts their first noncreature spell each turn, draw a card unless that player pays {X}, where X is Esper Sentinel's power.

Enchant creature

Enchanted creature gets +1/+1 for each enchantment you control and has first strike.

Enchant creature

Enchanted creature gets +1/+2 as long as it's white.

Enchanted creature has shroud as long as its controller controls another creature. (It can't be the target of spells or abilities.)

{T}: Add {W}.

When Flagstones of Trokair is put into a graveyard from the battlefield, you may search your library for a Plains card, put it onto the battlefield tapped, then shuffle.

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

Creatures you control gain indestructible until end of turn.

Enchant creature

As Flickering Ward enters the battlefield, choose a color.

Enchanted creature has protection from the chosen color. This effect doesn't remove Flickering Ward.

{W}: Return Flickering Ward to its owner's hand.

Enchant creature

Enchanted creature can't block, and its activated abilities can't be activated.

{S}: Enchanted creature gains defender until end of turn. ({S} can be paid with one mana from a snow source.)

{T}: Add {C}.

{T}, Sacrifice Ghost Quarter: Destroy target land. Its controller may search their library for a basic land card, put it onto the battlefield, then shuffle.

Flash (You may cast this spell any time you could cast an instant.)

Enchant creature

Enchanted creature gets +0/+2.

{T}: Another target creature you control gains protection from colorless or from the color of your choice until end of turn.

During your turn, your opponents can't cast spells or activate abilities of artifacts, creatures, or enchantments.

Enchant creature

Enchanted creature gets +1/+0 and has flying.

{3}{W}: Return Gryff's Boon from your graveyard to the battlefield attached to target creature. Activate only as a sorcery.

Aura spells you cast cost {1} less to cast.

Heroic -- Whenever you cast a spell that targets Hero of Iroas, put a +1/+1 counter on Hero of Iroas.

Enchant creature

Enchanted creature gets +1/+1 and has first strike.

Totem armor (If enchanted creature would be destroyed, instead remove all damage from it and destroy this Aura.)

Flash

Enchant creature

Enchanted creature gets +1/+2.

Target creature gets +2/+2 until end of turn. If it's an enchanted creature or enchantment creature, it also gains hexproof and indestructible until end of turn. (It can't be the target of spells or abilities your opponents control. Damage and effects that say "destroy" don't destroy it.)

Kor Spiritdancer gets +2/+2 for each Aura attached to it.

Whenever you cast an Aura spell, you may draw a card.

If you control a Plains, you may tap an untapped creature you control rather than pay this spell's mana cost.

Enchant creature

Enchanted creature has first strike.

Whenever an Aura enters the battlefield under your control, if you cast it, you may search your library for an Aura card with mana value less than or equal to that Aura and with a different name than each Aura you control, put that card onto the battlefield attached to Light-Paws, Emperor's Voice, then shuffle.

Enchant creature

Enchanted creature gets +2/+2 and has "{1}, Sacrifice a permanent: This creature gains flying until end of turn."

Flash

Enchant creature

Enchanted creature gets +1/+2.

Counter target spell unless its controller pays {1}.

As an additional cost to cast this spell, you may exile any number of white cards from your hand. This spell costs {2} less to cast for each card exiled this way.

Exile target artifact, creature, or enchantment with mana value X or less.

Enchant creature

Enchanted creature has protection from black and from red.

{T}: Add {C}.

{1}: Mishra's Factory becomes a 2/2 Assembly-Worker artifact creature until end of turn. It's still a land.

{T}: Target Assembly-Worker creature gets +1/+1 until end of turn.

Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)

Whenever you cast a noncreature spell, create a 1/1 white Monk creature token with prowess.

Enchant creature you control

Enchanted creature gets +1/+1.

Whenever enchanted creature deals combat damage to a player, you may sacrifice Mortal Obstinacy. If you do, destroy target enchantment.

{T}: Target creature you control gains protection from the color of your choice until end of turn.

{T}: Add one mana of any color among legendary creatures and planeswalkers you control.

Enchant snow land you control

When On Thin Ice enters the battlefield, exile target creature an opponent controls until On Thin Ice leaves the battlefield.

When Palace Jailer enters the battlefield, you become the monarch.

When Palace Jailer enters the battlefield, exile target creature an opponent controls until an opponent becomes the monarch.

(Gain the next level as a sorcery to add its ability.)

Spells your opponents cast during your turn cost {1} more to cast.

{2}{W}: Level 2

Creatures you control get +1/+1.

{4}{W}: Level 3

Whenever you attack, until end of turn, target attacking creature gets +1/+1 for each other attacking creature and gains double strike.

When Ranger-Captain of Eos enters the battlefield, you may search your library for a creature card with mana value 1 or less, reveal it, put it into your hand, then shuffle.

Sacrifice Ranger-Captain of Eos: Your opponents can't cast noncreature spells this turn.

You may exile a white card from your hand rather than pay this spell's mana cost.

Choose a color. All creatures gain protection from the chosen color until end of turn.

{T}: Add {C}.

{1}, {T}: Tap target land.

Flash

Enchant creature you control

When Saving Grace enters the battlefield, all damage that would be dealt this turn to you and permanents you control is dealt to enchanted creature instead.

Enchanted creature gets +0/+3.

Sacrifice Selfless Savior: Another target creature you control gains indestructible until end of turn. (Damage and effects that say "destroy" don't destroy it.)

Enchant creature

Enchanted creature gets +1/+1 and has vigilance.

Escape--{W}, Exile two other cards from your graveyard. (You may cast this card from your graveyard for its escape cost.)

Flash

Enchant creature

Enchanted creature gets +1/+2 and has vigilance.

Addendum -- When Sentinel's Mark enters the battlefield, if you cast it during your main phase, enchanted creature gains lifelink until end of turn.

Enchant creature

Enchanted creature has protection from green and from blue.

You may cast Aura and Equipment spells as though they had flash.

Whenever an Equipment enters the battlefield under your control, you may attach it to target creature you control.

Enchant creature

Enchanted creature gets +1/+1 and has flying.

{2}{W}: Return Skyblade's Boon to its owner's hand. Activate only if Skyblade's Boon is on the battlefield or in your graveyard.

When Skyclave Apparition enters the battlefield, exile up to one target nonland, nontoken permanent you don't control with mana value 4 or less.

When Skyclave Apparition leaves the battlefield, the exiled card's owner creates an X/X blue Illusion creature token, where X is the mana value of the exiled card.

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

Flash

Enchant creature

Enchanted creature gets +1/+1.

As long as enchanted creature has vigilance, it assigns combat damage equal to its toughness rather than its power.

Flash

Lifelink

When Solitude enters the battlefield, exile up to one other target creature. That creature's controller gains life equal to its power.

Evoke--Exile a white card from your hand.

Enchant creature

Enchanted creature gets +2/+2.

{1}{W}, Exile Spectral Steel from your graveyard: Return another target Aura or Equipment card from your graveyard to your hand.

Enchant creature (Target a creature as you cast this. This card enters the battlefield attached to that creature.)

Whenever enchanted creature deals damage, you gain that much life.

Enchant creature

Enchanted creature gets +1/+1 and has protection from creatures.

Whenever you cast an Aura, Equipment, or Vehicle spell, draw a card.

Exile target creature. Its controller gains life equal to its power.

{T}: Add {C}.

{1}, {T}, Sacrifice Tectonic Edge: Destroy target nonbasic land. Activate only if an opponent controls four or more lands.

Flash

Enchant creature

When Triclopean Sight enters the battlefield, untap enchanted creature.

Enchanted creature gets +1/+1 and has vigilance.

Put target nonland permanent into its owner's library just beneath the top X cards of that library.

Sacrifice Vigilant Martyr: Regenerate target creature.

{W}{W}, {T}, Sacrifice Vigilant Martyr: Counter target spell that targets an enchantment.

You may cast Ward of Lights as though it had flash. If you cast it any time a sorcery couldn't have been cast, the controller of the permanent it becomes sacrifices it at the beginning of the next cleanup step.

Enchant creature

As Ward of Lights enters the battlefield, choose a color.

Enchanted creature has protection from the chosen color. This effect doesn't remove Ward of Lights.