During a replay, the attacking player has the choice to continue their attack on their original target, choose a new target, or cancel their attack
As is, its probably too vulnerable to spot removal like Swords to Plowshares and Path to Exile
Giratina's first attack, Lost Impact, forces the player to put two energy from the Pokmon into the Lost Zone after attacking
[edit] The sub-menu screen gives the player the following options: Deck & Trunk : View cards in their possession and edit the contents of their Deck
You only untap one creature, but thats plenty exploitable with cards like The Infamous Cruelclaw, Roxanne, Starfall Savant, and any other creatures with valuable saboteur or attack triggers you want to get multiple times a turn