Vanishing 12 (This enchantment enters with twelve time counters on it. At the beginning of your upkeep, remove a time counter from it. When the last is removed, sacrifice it.)
Whenever one or more time counters are removed from this enchantment, scry 1 and you gain 1 life. Then if this enchantment has no time counters on it, exile it. When you do, take an extra turn after this one.

Activated abilities of lands your opponents control can't be activated unless they're mana abilities.
Sharkey has all activated abilities of lands your opponents control except mana abilities.
Mana of any type can be spent to activate Sharkey's abilities.

: Add one mana of any color in your commander's color identity.

, , Sacrifice this artifact: Destroy target artifact or enchantment.

, Sacrifice this creature: Counter target spell that targets a creature you control.

Flying, vigilance

Enchant creature
Enchanted creature loses all abilities and is a blue Frog creature with base power and toughness 1/1. (It loses all other card types and creature types.)

Create two 1/1 red Goblin creature tokens.
Storm (When you cast this spell, copy it for each spell cast before it this turn.)

Sandstorm deals 1 damage to each attacking creature.

Flying
When this creature enters, scry 3. (Look at the top three cards of your library, then put any number of them on the bottom and the rest on top in any order.)

Any number of target players may each search their library for a basic land card, put it onto the battlefield under their control, then shuffle.

At the beginning of your upkeep, if you have a card in hand, return this creature to its owner's hand.

Search your library for a basic land card, put it onto the battlefield tapped, then shuffle.

Haldir enters with X +1/+1 counters on it.
Vigilance
: Until end of turn, other Elves you control gain vigilance and get +1/+1 for each +1/+1 counter on Haldir.

Whenever you cast an instant or sorcery spell, create a 1/1 blue Bird Illusion creature token with flying.

Red instant and sorcery spells you control have lifelink.
Whenever a white instant or sorcery spell causes you to gain life, Firesong and Sunspeaker deals 3 damage to target creature or player.

Create a red Elemental creature token with trample and "This token's power and toughness are each equal to the number of instant and sorcery cards in your graveyard plus the number of cards with flashback you own in exile."
Flashback (You may cast this card from your graveyard for its flashback cost. Then exile it.)

When this creature enters, you gain 2 life.

: Add .
, : Add , , or .

Return target permanent card with mana value 3 or less from your graveyard to the battlefield. If this spell was cast from a graveyard, you may copy this spell and may choose a new target for the copy.
Flashback (You may cast this card from your graveyard for its flashback cost. Then exile it.)