Whenever a creature or planeswalker an opponent controls is dealt excess damage, if a Giant, Wizard, or spell you controlled dealt damage to it this turn, draw a card.

Commander Summary

Aegar, the Freezing Flame is a red and blue legendary creature that excels in spellslinging and instant/sorcery-based strategies. Aegar's ability triggers whenever you cast an instant or sorcery spell, allowing you to draw a card. This provides card advantage and helps keep your hand stocked with options. Additionally, Aegar's second ability, which allows you to pay a cost to tap him and deal damage to any target equal to the number of instant and sorcery spells you've cast this turn, provides a powerful and flexible win condition. However, Aegar's low toughness and vulnerability to creature-based aggression can make him challenging to protect on the battlefield.