Murmuring Bosk [Commander Anthology Volume II] Speed Duel you can reveal 1 Spell

you can reveal 1 Spell Card in your hand to treat this card's name as Cyber Dragon until the End Phase

take 500 damage

Set: Beatdown Type: Creature — Whale Rarity: Uncommon Cost: {3}{U}{U} {U}: Killer Whale gains flying until end of turn

Set: Amonkhet Type: Creature — Serpent Rarity: Uncommon Cost: {5}{U}{U} This spell costs {1} less to cast for each instant and sorcery card in your graveyard

If it attacks a Defense Position monster

Murmuring Bosk [Commander Anthology Volume II] Speed Duel you can reveal 1 SpellSet: Commander Anthology Volume II Type: Land Forest Rarity: Rare ({T}: Add {G}.) As Murmuring Bosk enters the battlefield, you may reveal a Treefolk card from your hand. If you don't, Murmuring Bosk enters the battlefield tapped. {T}: Add {W} or {B}. Murmuring Bosk deals 1 damage to you.