{T}: Add one mana of any color in your commander's color identity.

Astral Cornucopia enters the battlefield with X charge counters on it. {T}: Choose a color. Add one mana of that color for each charge counter on Astral Cornucopia.

As long as it's your turn, Radha, Heart of Keld has first strike. You may look at the top card of your library any time, and you may play lands from the top of your library. {4}{R}{G}: Radha gets +X/+X until end of turn, where X is the number of lands you control.

Whenever Radha, Heir to Keld attacks, you may add {R}{R}. {T}: Add {G}.

Trample When Regal Behemoth enters the battlefield, you become the monarch. Whenever you tap a land for mana while you're the monarch, add an additional one mana of any color.

Whenever a creature you control deals combat damage to a player, add that much {G}. Until end of turn, you don't lose this mana as steps and phases end.

Flying Whenever Savage Ventmaw attacks, add {R}{R}{R}{G}{G}{G}. Until end of turn, you don't lose this mana as steps and phases end.

Flash Whenever a player taps a land for mana, that player adds one mana of any type that land produced.

Exile the top seven cards of your library. Until end of turn, you may cast spells from among them. If this spell was cast from your hand, add ten mana of any one color.

For each land you control, create a Treasure token. (It's an artifact with "{T}, Sacrifice this artifact: Add one mana of any color.")

As an additional cost to cast this spell, reveal a creature card from your hand. Disaster Radius deals X damage to each creature your opponents control, where X is the revealed card's mana value.