Glacial Chasm [Ice Age] Artifact tap all untapped creatures that

tap all untapped creatures that share a creature type with it or untap all tapped creatures that share a creature type with it

Creatures you control gain protection from the chosen color until end of turn

" —Gamelen

and "this turn" and "until end of turn" effects end

Glacial Chasm [Ice Age] Artifact tap all untapped creatures thatSet: Ice Age Type: Land Uncommon 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.