Defender (This creature can't attack.)

Flying

When Ageless Sentinels blocks, it becomes a Bird Giant, and it loses defender. (It's no longer a Wall. This effect lasts indefinitely.)

Vigilance

Exile Cannon — When Canoptek Tomb Sentinel enters from a graveyard, exile up to one target nonland permanent.

Unearth (: Return this card from your graveyard to the battlefield. It gains haste. Exile it at the beginning of the next end step or if it would leave the battlefield. Unearth only as a sorcery.)

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

Vigilance

Indestructible (Damage and effects that say "destroy" don't destroy this creature. If its toughness is 0 or less, it's still put into its owner's graveyard.)

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

Crew 3 (Tap any number of creatures you control with total power 3 or more: This Vehicle becomes an artifact creature until end of turn.)

Flying, vigilance

Flying

Flying

Vigilance (Attacking doesn't cause this creature to tap.)

Whenever you cycle or discard a card, Hekma Sentinels gets +1/+1 until end of turn.

As long as you control a Jace planeswalker, Jace's Sentinel gets +1/+0 and can't be blocked.

Devoid (This card has no color.)

Whenever you cast a colorless spell, Kozilek's Sentinel gets +1/+0 until end of turn.

When Llanowar Sentinel enters, you may pay . If you do, search your library for a card named Llanowar Sentinel, put that card onto the battlefield, then shuffle.

Vigilance

Multicolored creatures you control have vigilance.

Nettle Sentinel doesn't untap during your untap step.

Whenever you cast a green spell, you may untap Nettle Sentinel.

When Quirion Sentinel enters, add one mana of any color.

Defender

When Reito Sentinel enters, target player mills three cards. (They put the top three cards of their library into their graveyard.)

: Put target card from a graveyard on the bottom of its owner's library.

As an additional cost to cast this spell, you may reveal a Dragon card from your hand.

Scaleguard Sentinels enters with a +1/+1 counter on it if you revealed a Dragon card or controlled a Dragon as you cast this spell.

: Change Sentinel's base toughness to 1 plus the power of target creature blocking or blocked by Sentinel. <I>(This effect lasts indefinitely.)</I>

Vigilance (Attacking doesn't cause this creature to tap.)

At the beginning of combat on each opponent's turn, tap target creature that player controls.

Flash

When Sentinel of the Pearl Trident enters, you may exile target historic permanent you control. If you do, return that card to the battlefield under its owner's control at the beginning of the next end step. (Artifacts, legendaries, and Sagas are historic.)

Sliver creatures you control have vigilance. (Attacking doesn't cause them to tap.)

When Sentinel Totem enters, scry 1. (Look at the top card of your library. You may put that card on the bottom.)

, Exile Sentinel Totem: Exile all graveyards.

Enchant creature

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

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

Flash

Flying

Backup 1 (When this creature enters, put a +1/+1 counter on target creature. If that's another creature, it gains the following ability until end of turn.)

Vigilance

Kicker (You may pay an additional as you cast this spell.)

Flying, defender

If Skyclave Sentinel was kicked, it enters with two +1/+1 counters on it.

As long as Skyclave Sentinel has a +1/+1 counter on it, it can attack as though it didn't have defender.

Protection from multicolored (This creature can't be blocked, targeted, dealt damage, enchanted, or equipped by anything multicolored.)

Whenever a nonbasic land an opponent controls enters, you gain 1 life.

Reach

When Stickytongue Sentinel enters, return up to one other target permanent you control to its owner's hand.

Whenever Sungold Sentinel enters or attacks, exile up to one target card from a graveyard.

Coven — : Choose a color. Sungold Sentinel gains hexproof from that color until end of turn and can't be blocked by creatures of that color this turn. Activate only if you control three or more creatures with different powers.

As long as you control a Teferi planeswalker, Teferi's Sentinel gets +4/+0.

Flying, protection from green

Defender

, : Vent Sentinel deals damage to target player or planeswalker equal to the number of creatures you control with defender.

Partner with Nikara, Lair Scavenger

Vigilance

When Yannik, Scavenging Sentinel enters, exile another creature you control until Yannik leaves the battlefield. When you do, distribute X +1/+1 counters among any number of target creatures, where X is the exiled creature's power.