EOT, Tim you for 1. I've also now accounted for the Courser's damage last turn.
UUD
Mountain.
Before I go any further, what is tapped to casts Caltrops (total of 3 mana)?
Rokapoke: 18
Hand: 4
Library: 28
Battlefield:
(U) Forest x1
(UUU) Mountain x3
(U) Wild Nacatl (2/2; Cat Warrior; ~ gets +1/+1 as long as you control a Mountain. ~ gets +1/+1 as long as you control a Plains.)
(U) Nessian Courser (3/3; Centaur Warrior)
(U) Prodigal Pyromancer (1/1; Human Wizard; T: ~ deals 1 damage to target creature or player.)
(U) Lowland Basilisk (1/3; Basilisk; Whenever ~ deals damage to a creature, destroy that creature at end of combat.)
Graveyard:
Exile:
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Mooseman: 16
Hand: 1
Library: 28
Battlefield:
(UU) Plains x2
(UUT) Forest x2
Caltrops (A, Whenever a creature attacks, Caltrops deals 1 damage to it.)
(U) Llanowar Augur (0/3, Sacrifice Llanowar Augur: Target creature gets +3/+3 and gains trample until end of turn. Play this ability only during your upkeep.)
(T) Devoted Druid (1/2, T: G .Put a -1/-1 counter on ~: Untap ~. )
(T) Tormented Angel (1/5, Flying)
(U) Stonehewer Giant (4/4, Vigilance. 1W, T: Search your library for an Equipment card and put it into play. Attach it to a creature you control. Then shuffle your library.
Graveyard:
Exile: