When an opponent casts a spell, if this permanent is an enchantment, it becomes a 4/4 Serpent creature with "This creature can't attack unless defending player controls an Island."
Cycling (, Discard this card: Draw a card.)

Enchant creature
All damage that would be dealt to you is dealt to enchanted creature instead.

Destroy target nonartifact, nonblack creature. It can't be regenerated.
Cycling (, Discard this card: Draw a card.)

Arc Lightning deals 3 damage divided as you choose among one, two, or three targets.

Sacrifice this creature: The next time a source of your choice would deal damage to any target this turn, prevent that damage.

: Destroy target creature with power 4 or greater.

First strike, haste
Echo (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.)

Each player may put an artifact, creature, enchantment, or land card from their hand onto the battlefield.

Echo (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.)

: Prevent the next 2 damage that would be dealt to any target this turn.

When this creature enters, return target enchantment card from your graveyard to your hand.

When this creature dies, add .

Flying
Whenever this creature attacks, it gets +2/+0 until end of turn.

When this creature enters, you may search your library for a Goblin card, reveal that card, put it into your hand, then shuffle.

Nonbasic lands don't untap during their controllers' untap steps.

When a player has no cards in hand, if this permanent is an enchantment, it becomes a 4/4 Crocodile creature.

, : Put a +1/+1 counter on target creature.

: Return this creature and target creature you control to their owner's hand.

Destroy target artifact.
Cycling (, Discard this card: Draw a card.)

Each player discards their hand, then draws cards equal to the greatest number of cards a player discarded this way.

Each player can't cast more than one spell each turn.

Draw two cards, then discard a card.

This creature can't be blocked except by creatures with flying.

Swampwalk (This creature can't be blocked as long as defending player controls a Swamp.)

Mountainwalk (This creature can't be blocked as long as defending player controls a Mountain.)
Echo (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.)

: This creature gets -1/-1 and gains flying until end of turn.

Enchant creature
Whenever enchanted creature deals combat damage to a player, that player sacrifices a land of their choice.

Sacrifice a creature: This creature gets +2/+2 until end of turn.

: This creature gets +1/+1 until end of turn.

Whenever a creature dies, that creature's controller may draw a card.

At the beginning of each player's upkeep, if that player controls more lands than each other player, the player creates a 1/1 green Saproling creature token.

: You gain 1 life.

Return target permanent to its owner's hand.
Cycling (, Discard this card: Draw a card.)

First strike
: Regenerate this creature.

Target player draws X cards.

Creatures you control get +1/+1.