Ancestral Knowledge [Weatherlight] Mercadian Masques We had taken refuge in

We had taken refuge in a small cave

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

where X is the number of Swamps you control

Exchange that card with the top card of your library

Ancestral Knowledge [Weatherlight] Mercadian Masques We had taken refuge inSet: 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