Okay, so that's 7 and you discard Volunteer Reserves
Plains
Dwarven Berserker
Done
Spidey: 15
Hand: 7
Battlefield:
(T) Mt
(U) Plains x2
(U) Island
(T) Swamp
(T) Roc Hatchling (3/3; Flying; ~ ETB w/four shell ctrs on it.; At the beginning of my upkeep, remove a shell ctr from ~.; As long as ~ has no shell ctrs on it, it gets +3/+2 and has flying.) *0 shell ctrs*
(T) Duskrider Falcon (1/1; Flying; Pro: Black)
(U) Benalish Missionary (1/1; 1W, T: Prevent all combat dmg that would be dealt by target blocked creature this turn)
(T) Sage Owl (1/1; Flying; When ~ ETB, look at the top four cards of my library, then put them back in any order)
(T) Odylic Wraith (2/2; Swampwalk; Whenever ~ deals dmg to a player, that player discards a card)
(S) Dwarven Berserker (1/1; Whenever ~ becomes blocked, it gets +3/+0 and gains trample ueot)
Graveyard: Straw Golem, Llanowar Druid
Exile:
Mooseman: 9
Hand: 9
Battlefield:
(UU) Swamp
(U) Mountain
(U) Forest
(U) Goblin Vandal (1/1, R: Destroy target artifact defending player controls. Goblin Vandal deals no combat damage this turn. Use this ability only if Goblin Vandal is attacking and unblocked and only once each turn.)
(T) Shadow Rider (3/3, Flanking)
(S) Redwood Treefolk (3/6)
Graveyard:Fledgling Djinn, Tendrils of Despair, Volunteer Reserves
Exile: