Astral Slide [Friday Night Magic 2006] Avatar They only specify the consequences

They only specify the consequences should you fail

{T}: Double the amount of each type of unspent mana you have

If you sacrifice an Island this way

Set: From the Vault: Legends Type: Legendary Creature — Elemental Rarity: Mythic Cost: {2}{G} You don't lose unspent green mana as steps and phases end

Some just help with the taking

Astral Slide [Friday Night Magic 2006] Avatar They only specify the consequencesSet: Friday Night Magic 2006 Type: Enchantment Rarity: Rare Cost: {2}{W} Whenever a player cycles a card, you may exile target creature. If you do, return that card to the battlefield under its owner's control at the beginning of the next end step. "The hum of the universe is never off key." Mystic elder