Underground River

T: Add U. 2U: Put an hour counter on this artifact. At the beginning of each upkeep, put an hour counter on this artifact. When the twelfth hour counter is put on this artifact, shuffle your hand and graveyard into your library, then draw seven cards. Exile this artifact.

Enchant land Enchanted land has "1G, T: Create a Tarmogoyf token." (It's a 1G Lhurgoyf creature with "Tarmogoyf's power is equal to the number of card types among cards in all graveyards and its toughness is equal to that number plus 1.")

Flying, vigilance, trample Whenever you attack, other creatures you control get +2/+2 and gain indestructible until end of turn. Unearth—Pay eight E. (Pay eight energy counters: Return this card from your graveyard to the battlefield. It gains haste. Exile it at the beginning of the next end step or if it would leave the battlefield. Unearth only as a sorcery.)

Lieutenant — At the beginning of combat on your turn, if you control your commander, create two 1/1 red Goblin creature tokens. Those tokens gain haste until end of turn. 2, Sacrifice a Goblin: This creature deals 1 damage to any target.

Trample, myriad (Whenever this creature attacks, for each opponent other than defending player, you may create a token copy that's tapped and attacking that player or a planeswalker they control. Exile the tokens at end of combat.) Polygoyf's power is equal to the number of card types among cards in all graveyards and its toughness is equal to that number plus 1.

When this land enters, you gain 1 life for each Locus on the battlefield. T: Add C.

T: Add C. T: Add W or B. This land deals 1 damage to you.

Devoid (This card has no color.) When you cast this spell, exile target artifact, enchantment, or land. Reach 2C, Sacrifice a land: Return this card from your graveyard to your hand. (C represents colorless mana.)