mtg time shifted cards Gaea's Blessing from Weatherlight (1997) and Spiral Timeshifted (2006). I opened my first-ever packs in January 1995. Revised (1994) and Fallen Empires (1994) immersed me into the game, and amassing wealth from their careful revelation. 50 Time Shifted Magic Cards

The first is a triggered ability: "When this permanent enters, target player may search their library for a card named [name], reveal it, put it into their hand, then shuffle." (6/6/2025) Note that the target player searches their library (which may be affected by effects such as that of Stranglehold) and that the card they find is revealed, even though these words aren't included in the ability's reminder text

The Ur-Dragon also has a game-ending effect once it hits the board, refilling your hand and slamming more dragons into play for free

But that is a factor too, of course

There are multiple ways to give Birds stat boosts, and with how easy it is to flood the battlefield with Birds, Murmuration makes them extra dangerous