Lullmage Mentor + Intruder Alarm

Prerequisites

• You control at least seven Merfolk.

Steps

1. 1Whenever an opponent casts a spell, activate Lullmage Mentor by tapping seven Merfolk you control, countering that spell.
2. 2Lullmage Mentor triggers, creating a 1/1 Merfolk creature token.
3. 3The Merfolk token enters the battlefield, triggering Intruder Alarm, untapping all creatures.
4. 4Repeat.

Effects

• Counter all spells opponents cast
• Lock