As an additional cost to cast this spell, exile a creature you control.

Flying

When Fear of Abduction enters, exile target creature an opponent controls.

When Fear of Abduction leaves the battlefield, put each card exiled with it into its owner's hand.

When Fear of Burning Alive enters, it deals 4 damage to each opponent.

Delirium — Whenever a source you control deals noncombat damage to an opponent, if there are four or more card types among cards in your graveyard, Fear of Burning Alive deals that amount of damage to target creature that player controls.

Whenever Fear of Failed Tests deals combat damage to a player, draw that many cards.

When Fear of Immobility enters, tap up to one target creature. If an opponent controls that creature, put a stun counter on it. (If a permanent with a stun counter would become untapped, remove one from it instead.)

Flying, lifelink

Fear of Infinity can't block.

Eerie — Whenever an enchantment you control enters and whenever you fully unlock a Room, you may return Fear of Infinity from your graveyard to your hand.

When Fear of Lost Teeth dies, it deals 1 damage to any target and you gain 1 life.

Flying

Eerie — Whenever Fear of Sleep Paralysis or another enchantment you control enters and whenever you fully unlock a Room, tap up to one target creature and put a stun counter on it.

Stun counters can't be removed from permanents your opponents control. (They won't untap if they have stun counters.)

Whenever Fear of the Dark attacks, if defending player controls no Glimmer creatures, it gains menace and deathtouch until end of turn. (A creature with menace can't be blocked except by two or more creatures.)