Secret Lair Promo

Creature — Dragon

Delve (Each card you exile from your graveyard while casting this spell pays for {1}.)
Flying
This creature enters with a +1/+1 counter on it for each instant and sorcery card exiled with it.
Whenever an instant or sorcery card leaves your graveyard, put a +1/+1 counter on this creature.

Murktide Regent

Secret Lair Drop

Creature — Cat Beast

When this creature enters, you may exile another target permanent you control, then return that card to the battlefield under its owner's control.

Felidar Guardian

Creature — Drake

Flying
When this creature enters, untap up to five lands.

Peregrine Drake

Enchantment Creature — Serpent

Krakens, Leviathans, Octopuses, and Serpents you control can't be blocked except by Krakens, Leviathans, Octopuses, and Serpents.

Serpent of Yawning Depths

Flying
Whenever this creature or another Dragon you control enters, it deals X damage to any target, where X is the number of Dragons you control.
{R}: This creature gets +1/+0 until end of turn.

Scourge of Valkas

Creature — Hydra

Trample
This creature enters with X +1/+1 counters on it.
When this creature enters, choose one —
• Double the number of +1/+1 counters on this creature.
• This creature fights target creature you don't control.