Atlantis Hobby

Legendary Creature — Bird Skeleton Warlock

Flying When Moseo enters, create a 1/1 black and green Pest creature token with "Whenever this token attacks, you gain 1 life." Infusion — At the beginning of your end step, if you gained life this turn, return up to one target creature card with mana value X or less from your graveyard to the battlefield, where X is the amount of life you gained this turn.

Creature — Elemental Hydra

Trample (This creature can deal excess combat damage to the player or planeswalker it's attacking.) This creature enters with a +1/+1 counter on it. Landfall — Whenever a land you control enters, double the number of +1/+1 counters on this creature.

Artifact

This artifact enters tapped. {T}: Add {G}.

Land

{1}, {T}: Add {R}{G}.

Creature — Plant Skeleton

Kicker {3} (You may pay an additional {3} as you cast this spell.) If this creature was kicked, it enters with three +1/+1 counters on it. Whenever one or more +1/+1 counters are put on a creature you control, if this card is in your graveyard, you may put this card on top of your library.

Land

Hideaway 4 (When this land enters, look at the top four cards of your library, exile one face down, then put the rest on the bottom in a random order.) This land enters tapped. {T}: Add {G}. {G}, {T}: You may play the exiled card without paying its mana cost if creatures you control have total power 10 or greater.

Enchantment — Aura

Flash Enchant creature Enchanted creature gets +2/+1. When enchanted creature dies, create two Treasure tokens.

Creature — Shapeshifter

Changeling (This card is every creature type.) Tap an untapped creature you control: This creature gains flying until end of turn.

Creature — Bear

{3}{G}{G}, Exile this card from your graveyard: Create two 2/2 green Bear creature tokens. Activate only as a sorcery.

Basic Land — Mountain

({T}: Add {R}.)

Legendary Land

{T}, Pay 1 life: Add {B} or {R}. {1}{B}{R}, {T}: Mount Doom deals 1 damage to each opponent. {5}{B}{R}, {T}, Sacrifice Mount Doom and a legendary artifact: Choose up to two creatures, then destroy the rest. Activate only as a sorcery.

Artifact Creature — Robot

This creature can't attack unless you control another artifact.

Sorcery // Sorcery

Creature — Elemental

Flying Ward {2} (Whenever this creature becomes the target of a spell or ability an opponent controls, counter it unless that player pays {2}.) When this creature enters, creatures your opponents control get -3/-0 until your next turn.

Legendary Creature — Dog

Vigilance, trample If one or more +1/+1 counters would be put on Mowu, that many plus one +1/+1 counters are put on it instead.

Legendary Artifact

{T}: Add one mana of any color. Activate only if you control a Dragon.

Legendary Artifact

Metalcraft — {T}: Add one mana of any color. Activate only if you control three or more artifacts.

Creature — Goblin Warlock

As an additional cost to cast this spell, behold a Goblin or pay {2}. (To behold a Goblin, choose a Goblin you control or reveal a Goblin card from your hand.) This creature can't block. When this creature dies, destroy target creature an opponent controls with power 2 or less.