Each spell with overload has a target, but if you cast it for its overload cost rather than its mana cost, you can change the word "target" to "each," or what the Izzet used to call "restraint." Remember that a spell with targets can fail to resolve because its targets become illegal, but once you overload it, it no longer has targets, so it can no longer fail to resolve this way
1 Rick, Steadfast Leader The only card of the Walking Dead Secret Lair cards that saw continued Legacy success, Rick, Steadfast Leader is the best card from the lot
Run the numbers
While the Gale's Ambition drop shows us everything that the wizard aspires to be, it also features his hunky side
Opponents can usually sniff out which battalion creature to remove before it has a chance to attack, but Legion Loyalist attacks the turn it hits the field, hopefully with a boardstate thatll allow you to trigger its effect
Pay the eternalize cost, exile the card from your graveyard, and be richly rewarded with a 4/4 copy of that card, except it's a black Zombie in addition to its other types and it has no mana cost (and thus has mana value 0)