Political Trickery

Exchange control of target land you control and target land an opponent controls. (This effect lasts indefinitely.)

Mox Emerald

Biorhythm

Each player's life total becomes the number of creatures they control.

Runeclaw Bear

Timetwister

Each player shuffles their hand and graveyard into their library, then draws seven cards. (Then put Timetwister into its owner's graveyard.)

Ancestral Recall

Ornithopter

Time Walk

Black Lotus

{T}, Sacrifice Black Lotus: Add three mana of any one color.

Forest

Generous Ent

Reach
When Generous Ent enters, 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.)

Force of Will

You may pay 1 life and exile a blue card from your hand rather than pay this spell's mana cost.
Counter target spell.

Thrun, the Last Troll

This spell can't be countered.
Hexproof (This creature can't be the target of spells or abilities your opponents control.)
{1}{G}: Regenerate Thrun, the Last Troll.