We don't have any Common Lands yet. This Bonus Round is here to fix that!

We'll be voting for each cycle as a whole, not piecemeal.

My submission:

Temple of Elori
Land (C)
Temple of Elori enters the battlefield tapped.
: Add to your mana pool.
Oblation—Whenever an enchantment enters the battlefield under your control, you may sacrifice Temple of Elori. If you do, you gain 5 life.

Frostblight Tower
Land (C)
Frostblight Tower enters the battlefield tapped.
: Add to your mana pool.
Oblation—Whenever an artifact enters the battlefield under your control, you may sacrifice Frostblight Tower. If you do, tap up to three target creatures.

Bahraz's Keep
Land (C)
Bahraz's Keep enters the battlefield tapped.
: Add to your mana pool.
Oblation—Whenever you cast an instant or sorcery spell, you may sacrifice Bahraz's Keep. If you do, target player discards a card at random.

Illpyre Wastes
Land (C)
Illpyre Wastes enters the battlefield tapped.
: Add to your mana pool.
Oblation—Whenever a creature enters the battlefield under your control, you may sacrifice Illpyre Wastes. If you do, creatures you control gain haste and trample until end of turn.

Heart of Maraka
Land (C)
Heart of Maraka enters the battlefield tapped.
: Add to your mana pool.
Oblation—Whenever another land enters the battlefield under your control, you may sacrifice Heart of Maraka. If you do, put two 1/1 green Spawn creature tokens onto the battlefield.

We could move the currently-incomplete uncommon cycle to common.

That could work too, actually!

Did we ever decide on exactly what that cycle would be, though?

Spire of Hope
Land
Spire of Hope enters the battlefield tapped.
: Add to your mana pool.
, , Sacrifice Spire of Hope: Return target enchantment card from your graveyard to your hand.

Spire of Creation
Land
Spire of Creation enters the battlefield tapped.
: Add to your mana pool.
, , Sacrifice Spire of Creation: Return target artifact card from your graveyard to your hand.

Spire of Redemption
Land
Spire of Redemption enters the battlefield tapped.
: Add to your mana pool.
, , Sacrifice Spire of Redemption: Return target creature card from your graveyard to your hand.

Spire of Inspiration
Land
Spire of Inspiration enters the battlefield tapped.
: Add to your mana pool.
, , Sacrifice Spire of Inspiration: Return target instant or sorcery card from your graveyard to your hand.

Spire of Unity
Land
Spire of Unity enters the battlefield tapped.
: Add to your mana pool.
, , Sacrifice Spire of Unity: Return target card from your graveyard to your hand.

Parad suggested keeping the activation of the green card the same but having it put the card on top of your library. I think the loss of a card would make the green one markedly worse than the rest of the cycle.

I'm going to add all these to the spoiler at Common, except I'm going to change the name of Spire of Redemption to Spire of Undeath because Redemption sounds more to me than . That cool with people?

That makes us finished with the lands!

Cool. I like the names, too, with the change Parad suggested.

But I had a land design that I wanted to slip into the set at some point
Probably best if we don't have any more though.