Sadistic Sacrament

Kicker {7} (You may pay an additional {7} as you cast this spell.)
Search target player's library for up to three cards, exile them, then that player shuffles. If this spell was kicked, instead search that player's library for up to fifteen cards, exile them, then that player shuffles.

Ice Cave

Whenever a player casts a spell, any other player may pay that spell's mana cost. If a player does, counter the spell. (Mana cost includes color.)

Frozen Aether

Artifacts, creatures, and lands your opponents control enter tapped.

Idyllic Tutor

Search your library for an enchantment card, reveal it, put it into your hand, then shuffle.

Reverence

Creatures with power 2 or less can't attack you.

Sunken Field

Enchant land
Enchanted land has "{T}: Counter target spell unless its controller pays {1}."