Agadeem, the Undercrypt

As Agadeem, the Undercrypt enters, you may pay 3 life. If you don't, it enters tapped.
{T}: Add {B}.

Agadeem's Awakening

Return from your graveyard to the battlefield any number of target creature cards that each have a different mana value X or less.

Untap all permanents you control during each other player's untap step.

{T}: Add {C}.
{T}: Add {G} or {W}. Brushland deals 1 damage to you.

({T}: Add {G} or {W}.)
As Temple Garden enters, you may pay 2 life. If you don't, it enters tapped.

Bountiful Promenade enters tapped unless you have two or more opponents.
{T}: Add {G} or {W}.

As an additional cost to cast this spell, pay X life.
All creatures get -X/-X until end of turn.

As Sea Gate, Reborn enters, you may pay 3 life. If you don't, it enters tapped.
{T}: Add {U}.

Draw cards equal to the number of cards in your hand plus one. You have no maximum hand size for the rest of the game.