Psychic Battle [Invasion] Elf Berserker Tell me more about this

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Set: Revised Edition Type: Creature — Illusion Rarity: Uncommon Cost: {3}{U} Flying

Reinforce 3—{3}{G} ({3}{G}

Set: Unstable Type: Artifact — Contraption Rarity: Rare Whenever you crank Oaken Power Suit

Set: Mercadian Masques Type: Creature — Manticore Rarity: Rare Cost: {3}{R} Flying

Psychic Battle [Invasion] Elf Berserker Tell me more about thisSet: Invasion Type: Enchantment Rarity: Rare Cost: {3}{U}{U} Whenever a player chooses one or more targets, each player reveals the top card of their library. The player who reveals the card with the highest mana value may change the target or targets. If two or more cards are tied for highest, the target or targets remain unchanged. Changing targets this way doesn't trigger abilities of permanents named Psychic Battle.