Infinite Mana We have varying ways of producing infinite mana: Deadeye Navigator + Peregrine Drake OR Palinchron: Pre-requisites: At least 3 lands in play
It seems like a 3/2 for three, which just happens to do something extra every once in a while
Tap for green mana per Elf, fueling plays while Archdruid also buffs them
Now you do need to have a location in your hand for his effect to do anything, but with some smart mulliganing and/or a good amount of draw, that should be consistently achievable on curve
Investing isn't easy, and if something seems too good to be true, it probably is
Even if Samurai's Katana costs 5 mana to reattach it to something else, leaving the equipment behind is an entirely free bonus on whats already a strong creature