With Hardened Scales in play, it would grant a total of seven instead
Combo #1: Spike Feeder and Sunbond While this probably isn't a great comparison, it wasn't that long ago that Modern was dominated by a two-card combo that involved getting a four-converted-mana-cost enchantment (Splinter Twin) onto a three-converted-mana-cost creature (Deceiver Exarch or Pestermite), and the combo of Spike Feeder and Sunbond works pretty much the same way
Since its vastly easier to obtain English cards in comparison to Japanese ones when outside Japan, the target market for English cards is thus larger because it includes a wider swathe of competitive Pokmon TCG players
That means two +1/+1 counters at the minimum, and usually much more than that
For monitoring purposes, GameStop's website reflects online shipping inventory most reliably
If you do, untap Leviathan