Ancestral Knowledge [Weatherlight] Mercadian Masques Set: Rise of the Eldrazi

Set: Rise of the Eldrazi Type: Legendary Creature — Eldrazi Rarity: Mythic Cost: {10} When you cast this spell

Set: The Dark Type: Enchantment Rarity: Rare Cost: {B}{B}{B} At the beginning of your upkeep

choose a creature type

Set: Commander's Arsenal Type: Enchantment Rarity: Common Cost: {2}{U} Whenever an opponent casts a spell

Ancestral Knowledge [Weatherlight] Mercadian Masques Set: Rise of the EldraziSet: Weatherlight Type: Enchantment Rarity: Rare Cost: {1}{U} Cumulative upkeep {1} (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it.) When Ancestral Knowledge enters the battlefield, look at the top ten cards of your library, then exile any number of them and put the rest back on top of your library in any order. When Ancestral Knowledge leaves the