You can choose to loot a card, grow the equipped creature with a +1/+1 counter, or untap two lands (which basically pays for the equip cost)
The Legends of Phyrexia: All Will Be One All will be one
Plus, like Haliya, only costing one mana isn't going to eat too much into what else you do in a turn
A card is considered functionally identical to another card if it has the same card type, subtypes, abilities, mana cost, power, and toughness
Since Fighter is not an actual creature type in Magic , I am choosing to fudge this text slightly and have it make a warrior instead, in order to remain compatible with the party mechanic from Zendikar Rising
With Inferno Titan, we are likely killing a creature or two, which should be good enough even if they do kill it