Bestow (If you cast this card for its bestow cost, it's an Aura spell with enchant creature. It becomes a creature again if it's not attached.)

Landfall — Whenever a land enters the battlefield under your control, put a +1/+1 counter on Glyph Elemental.

Enchanted creature gets +1/+1 for each +1/+1 counter on Glyph Elemental.