Whenever a permanent enters the battlefield tapped and under your control, untap it.

{2}, {T}, Sacrifice Expedition Map: Search your library for a land card, reveal it, put it into your hand, then shuffle.

Reach When Arboreal Grazer enters the battlefield, you may put a land card from your hand onto the battlefield tapped.

You may play two additional lands on each of your turns.

Trample Cultivator Colossus's power and toughness are each equal to the number of lands you control. When Cultivator Colossus enters the battlefield, you may put a land card from your hand onto the battlefield tapped. If you do, draw a card and repeat this process.

You may play an additional land on each of your turns. Lands you control are every basic land type in addition to their other types.

Boros Garrison enters the battlefield tapped. When Boros Garrison enters the battlefield, return a land you control to its owner's hand. {T}: Add {R}{W}.

{T}: Add {G}. Channel — {1}{G}, Discard Boseiju, Who Endures: Destroy target artifact, enchantment, or nonbasic land an opponent controls. That player may search their library for a land card with a basic land type, put it onto the battlefield, then shuffle. This ability costs {1} less to activate for each legendary creature you control.

Crumbling Vestige enters the battlefield tapped. When Crumbling Vestige enters the battlefield, add one mana of any color. {T}: Add {C}. ({C} represents colorless mana.)

({T}: Add {G}.)

If Gemstone Caverns is in your opening hand and you're not the starting player, you may begin the game with Gemstone Caverns on the battlefield with a luck counter on it. If you do, exile a card from your hand. {T}: Add {C}. If Gemstone Caverns has a luck counter on it, instead add one mana of any color.

Golgari Rot Farm enters the battlefield tapped. When Golgari Rot Farm enters the battlefield, return a land you control to its owner's hand. {T}: Add {B}{G}.

Gruul Turf enters the battlefield tapped. When Gruul Turf enters the battlefield, return a land you control to its owner's hand. {T}: Add {R}{G}.

{T}: Add {U}. Channel — {3}{U}, Discard Otawara, Soaring City: Return target artifact, creature, enchantment, or planeswalker to its owner's hand. This ability costs {1} less to activate for each legendary creature you control.

Selesnya Sanctuary enters the battlefield tapped. When Selesnya Sanctuary enters the battlefield, return a land you control to its owner's hand. {T}: Add {G}{W}.

Simic Growth Chamber enters the battlefield tapped. When Simic Growth Chamber enters the battlefield, return a land you control to its owner's hand. {T}: Add {G}{U}.

{T}: Add {C}. {R}{W}, {T}: Target creature gets +2/+0 and gains vigilance and haste until end of turn.

{T}: Add {C}. {2}{R}{W}, {T}: Target creature gains double strike until end of turn.

{T}: Add {C}. {1}, {T}: Add one mana of any color. {X}, {T}: The Mycosynth Gardens becomes a copy of target nontoken artifact you control with mana value X.

Tolaria West enters the battlefield tapped. {T}: Add {U}. Transmute {1}{U}{U} ({1}{U}{U}, Discard this card: Search your library for a card with mana value 0, reveal it, put it into your hand, then shuffle. Transmute only as a sorcery.)

(As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.) I — Urza's Saga gains "{T}: Add {C}." II — Urza's Saga gains "{2}, {T}: Create a 0/0 colorless Construct artifact creature token with 'This creature gets +1/+1 for each artifact you control.'" III — Search your library for an artifact card with mana cost {0} or {1}, put it onto the battlefield, then shuffle.

Valakut, the Molten Pinnacle enters the battlefield tapped. Whenever a Mountain enters the battlefield under your control, if you control at least five other Mountains, you may have Valakut, the Molten Pinnacle deal 3 damage to any target. {T}: Add {R}.

Bojuka Bog enters the battlefield tapped. When Bojuka Bog enters the battlefield, exile target player's graveyard. {T}: Add {B}.

({B/P} can be paid with either {B} or 2 life.) Target creature gets -5/-5 until end of turn.

Flash Reach When Endurance enters the battlefield, up to one target player puts all the cards from their graveyard on the bottom of their library in a random order. Evoke—Exile a green card from your hand.

Sunburst (This enters the battlefield with a charge counter on it for each color of mana spent to cast it.) {2}, Sacrifice Engineered Explosives: Destroy each nonland permanent with mana value equal to the number of charge counters on Engineered Explosives.

Reach When Generous Ent enters the battlefield, create a Food token. (It's an artifact with "{2}, {T}, Sacrifice this artifact: You gain 3 life.") Forestcycling {1} ({1}, Discard this card: Search your library for a Forest card, reveal it, put it into your hand, then shuffle.)

Khalni Garden enters the battlefield tapped. When Khalni Garden enters the battlefield, create a 0/1 green Plant creature token. {T}: Add {G}.

Counter target spell. At the beginning of your next upkeep, pay {3}{U}{U}. If you don't, you lose the game.

When Radiant Fountain enters the battlefield, you gain 2 life. {T}: Add {C}.

Counter target enchantment, instant, or sorcery spell. Its controller creates a 2/2 blue Bird creature token with flying.

Kicker {1}{B} (You may pay an additional {1}{B} as you cast this spell.) Exile target artifact or enchantment. If this spell was kicked, exile target nonland permanent instead.

{T}, Sacrifice Tormod's Crypt: Exile target player's graveyard.