Exile target enchantment. Search its controller's graveyard, hand, and library for all cards with the same name as that enchantment and exile them. Then that player shuffles.
When Scourge of Fleets enters the battlefield, return each creature your opponents control with toughness X or less to its owner's hand, where X is the number of Islands you control.
Flying {1}{R}: Scourge of Kher Ridges deals 2 damage to each creature without flying. {5}{R}: Scourge of Kher Ridges deals 6 damage to each other creature with flying.
Flying Whenever Scourge of Valkas or another Dragon enters the battlefield under your control, it deals X damage to any target, where X is the number of Dragons you control. {R}: Scourge of Valkas gets +1/+0 until end of turn.
Flying Dethrone Whenever Scourge of the Throne attacks for the first time each turn, if it's attacking the player with the most life or tied for most life, untap all attacking creatures. After this phase, there is an additional combat phase.
For each nonland permanent, choose a player at random. Then each player gains control of each permanent for which they were chosen. Untap those permanents.
Each player exiles all artifact cards from their graveyard, then sacrifices all artifacts they control, then puts all cards they exiled this way onto the battlefield.
"Where a lesser mind sees junk, I see infinite potential."
Flying, menace Whenever Screeching Scorchbeast attacks, each player gets two rad counters. Whenever one or more nonland cards are milled, you may create that many 2/2 black Zombie Mutant creature tokens. Do this only once each turn.