Sliver Overlord [Scourge] Magic Player Rewards 2007 the player can activate mana

the player can activate mana abilities only if they're from lands that player controls and only if mana they produce is spent to activate other mana abilities of lands the player controls and/or to play that card

Sacrifice Aura of Silence: Destroy target artifact or enchantment

sacrifice an artifact

Set: Gateway 2007 Type: Creature — Elf Druid Rarity: Rare Cost: {G} {T}: Add {G}

The landbound envy the birds' ultimate freedom in the sky

Sliver Overlord [Scourge] Magic Player Rewards 2007 the player can activate manaSet: Scourge Type: Legendary Creature Sliver Mutant Rarity: Rare Cost: {W}{U}{B}{R}{G} {3}: Search your library for a Sliver card, reveal that card, put it into your hand, then shuffle. {3}: Gain control of target Sliver. (This effect lasts indefinitely.) The end of evolution.