Glacial Chasm [From the Vault: Realms] SPA Ordenes del Patriarca Set: Kaladesh Type: Instant Rarity:

Set: Kaladesh Type: Instant Rarity: Common Cost: {1}{B} Target creature gets +1/+0 and gains lifelink and indestructible until end of turn

When Arena of the Ancients enters the battlefield

you may play that card

Set: Eldritch Moon Type: Creature — Eldrazi Insect Common Cost: {8} Emerge {6}{G} (You may cast this spell by sacrificing a creature and paying the emerge cost reduced by that creature's converted mana cost

The wise know that it is the other way around

Glacial Chasm [From the Vault: Realms] SPA Ordenes del Patriarca Set: Kaladesh Type: Instant Rarity:Set: From the Vault: Realms Type: Land Mythic Cost: Cumulative upkeepPay 2 life. (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 Glacial Chasm enters the battlefield, sacrifice a land. Creatures you control can't attack. Prevent all damage that would be dealt to you.