The Counter effect allows a character card to be trashed to add the specified value to the defending card's power, or an event to activate the effect as detailed on the card
Viable stall tactics against aggressive opponents
Aside from , in case of , Blue Eyes is not a group of cards that activate powerful effects by leaving the field or Special Summoned from the hand

Advanced Search Sets Random Syntax Release date: 2013-05-01 Advent of the Wurm Alive // Well Alive // Well Armed // Dangerous Armed // Dangerous Armored Wolf-Rider Ascended Lawmage Awe for the Guilds Azorius Cluestone Azorius Guildgate Bane Alley Blackguard Battering Krasis Beck // Call Beck // Call Beetleform Mage Blast of Genius Blaze Commando Blood Baron of Vizkopa Blood Scrivener Boros Battleshaper Boros Cluestone Boros Guildgate Boros Mastiff Breaking // Entering Breaking // Entering Bred for the Hunt Bronzebeak Moa Carnage Gladiator Catch // Release Catch // Release Clear a Path Council of the Absolute Crypt Incursion Deadbridge Chant Debt to the Deathless Deputy of Acquittals Dimir Cluestone Dimir Guildgate Down // Dirty Down // Dirty Dragonshift Drown in Filth Emmara Tandris Exava, Rakdos Blood Witch Far // Away Far // Away Fatal Fumes Feral Animist Flesh // Blood Flesh // Blood Fluxcharger Gaze of Granite Give // Take Give // Take Gleam of Battle Goblin Test Pilot Golgari Cluestone Golgari Guildgate Gruul Cluestone Gruul Guildgate Gruul War Chant Haazda Snare Squad Haunter of Nightveil Hidden Strings Hired Torturer Izzet Cluestone Izzet Guildgate Jelenn Sphinx Korozda Gorgon Krasis Incubation Kraul Warrior Lavinia of the Tenth

Loot, Exuberant Explorer Loot, Exuberant Explorer clearly cares about lands, and you can even play two lands a turn
Its a combat trick, a protection spell, and a tempo swing all in one, and it pairs beautifully with cheap blue creatures like Cloudfin Raptor