When this creature enters, each player may cache the top card of their library face down.
{3}{G}: This creature gets +3/+3 until end of turn. Activate only once each turn.

Lifelink
Approval — {5}, {T}: Tap target creature. This ability costs {X} less to activate, where X is the number of colors among permanents you control.

Whenever Claes, Shield of Karda attacks, another target attacking creature you control gains indestructible until end of turn.
Whenever a planeswalker you control enters, you may exile Claes, then return him to the battlefield transformed with a number of loyalty counters on him equal to the starting loyalty of that planeswalker.

Flying
When this creature enters, exile up to one target nontoken creature you don't control.
When this creature leaves the battlefield, the exiled card's owner draws X cards and gains X life, where X is half that card's mana value, rounded up.

At the beginning of combat on your turn, you may pay {X}. When you do, choose up to X. Each mode must have different targets.
• Teach target creature flying.
• Teach target creature lifelink.
• Teach target creature vigilance.

Flash
Flying, lifelink
Your opponents can't create tokens.

Whenever this creature becomes tapped, exile up to one target card from an opponent's graveyard.
{3}{W}, {T}: Create a 1/1 white Monk creature token with vigilance.

When Opal-Eye Caretaker enters, put a +1/+1 counter on each creature you control that entered this turn and wasn't cast from your hand.
Wander {1}{W}

When Patron of Ephara's Glory enters, create a 0/1 colorless Sculpture artifact creature token.
Whenever a creature you control dies, scry 1, then you gain 1 life.

Flying
Creatures you control with base power 1 or less get +1/+0.

When Soothing Singer enters, exile target nonland permanent you don't control until Soothing Singer leaves the battlefield.
{1}{W}: Soothing Singer gets +0/+2 until end of turn.

First strike
Cybersoul {4}{W}

When this creature enters, cache the top card of your library face down.

Whenever another nontoken creature you control enters, you may pay {1}. If you do, create a white Subroutine enchantment token named ALARM with “Whenever this Subroutine runs, create a 1/1 white Citizen creature token.”

Flying, vigilance
{W}, {T}: Tap target creature.

When this creature enters, mill three cards, then you may exile an instant, sorcery, or Subroutine card from your graveyard. You may cast a copy of that card. If you don't, cache it.

Vigilance
{T}, Sacrifice a creature: Target creature can't be blocked this turn. Activate only if you control a black permanent.

Ninjutsu {U}
Whenever this creature deals combat damage to a player or planeswalker, you may draw a card. If you do, discard a card unless this creature entered this turn.

Flash
When this creature enters, cache up to one other target permanent you control.

Flying
Whenever you draw your second card each turn, put a +1/+1 counter on Haubay's Familiar.

When Invader of Privacy enters, surveil 1, then draw a card.

Whenever you draw your second card each turn, scry 1 then put a +1/+1 counter on Melancholic Oracle.

When this creature enters, mill four cards. You may return a noncreature, nonland card milled this way to your hand.
{1}{W}: This creature gets +1/+0 and gains first strike until end of turn.

Flash
When Permafrost Lynx enters, target creature you don't control doesn't untap during its controller's next untap step.

Flying
When this creature enters, you may pay {3}{U}. If you do, create two 1/1 blue Bird creature tokens with flying.
Other creatures you control with flying get +1/+1.