Roar of the Wurm
{6}{G}
Sorcery
Create a 6/6 green Wurm creature token.
Flashback {3}{G} (You may cast ~this~ from your graveyard for its flashback cost. Then exile it.)
Sandwurm Convergence
{6}{G}{G}
Enchantment
Creatures with flying can't attack you or planeswalkers you control.
At the beginning of your end step, create a 5/5 green Wurm creature token.
Wurmweaver Coil
{4}{G}{G}
Enchantment -- Aura
Enchant green creature
Enchanted creature gets +6/+6.
{G}{G}{G}, Sacrifice ~this~: Create a 6/6 green Wurm creature token.