Crystal Rod [Seventh Edition]

Crystal Rod [Seventh Edition]Set: Seventh Edition Type: Artifact Rarity: Uncommon Cost: {1} Whenever a player casts a blue spell, you may pay {1}. If you do, you gain 1 life. Polished by a thousand waves.

and that player can't activate abilities that aren't mana abilities

My strength has not

Set: Mercadian Masques Type: Enchantment Rarity: Uncommon Cost: {2}{B}{B}{B} Creatures you control have fear

It surveys the withering landscape

Set: Dissension Type: Artifact Rarity: Common Cost: {2} {1}

Set: Urza's Legacy Type: Artifact Rarity: Rare Cost: {3} Whenever an artifact or enchantment is put into your graveyard from the battlefield

Copy target instant or sorcery spell

discard a card or pay {5}

Put that card in your hand and exile all other cards revealed this way

Set: Portal Three Kingdoms Type: Sorcery Rarity: Uncommon Cost: {1}{R} Rockslide Ambush deals damage to target creature equal to the number of Mountains you control

remove a +1/+0 counter from it

/ Which tells us the way to go