Playing a land is a player action that doesn't use the stack and can't be responded to
These are traditional Ramp decks, containing lots of land acceleration such as Explore and Sakura-Tribe Elder
Creatures (27) 4 Mother of Runes 2 Mangara of Corondor 2 Aven Mindcensor 3 Flickerwisp 4 Stoneforge Mystic 3 Mirran Crusader 4 Phyrexian Revoker 1 Fiend Hunter 4 Thalia, Guardian of Thraben Lands (23) Spells (10) Decks like Ari Laxs Death and Taxes could use Mother of Runes to pressure opposing removal spells, protect ones self from opposing attacks, or just force through some damage
The next time a source of your choice would deal damage to you this turn, prevent that damage
If for some reason, that is not working for you (or I repeated something incorrectly here?), after beating the game and watching the credits, there's a random chance each time you start the game that the Challenge Hall will have a new event to participate in
In our example Play Booster, we opened Overkill, a powerful spell that can eliminate almost any creature