You don’t lose unspent green mana as steps and phases end. Omnath, Locus of Mana gets +1/+1 for each unspent green mana you have.
Reach (This creature can block creatures with flying.) Deathtouch (Any amount of damage this deals to a creature is enough to destroy it.)
Put three 1/1 green Elf Warrior creature tokens into play. Reinforce 3—3G (3G, Discard this card: Put three +1/+1 counters on target creature.)
This creature has hexproof as long as it’s untapped. (It can’t be the target of spells or abilities your opponents control.) {T}: Add one mana of any color.
When Pursued Whale enters, each opponent creates a 1/1 red Pirate creature token with “This creature can’t block” and “Creatures you control attack each combat if able.” Spells your opponents cast that target Pursued Whale cost {3} more to cast.
Reveal the top five cards of your library. An opponent separates those cards into two piles. Put one pile into your hand and the other into your graveyard.
Choose one – Counter target sorcery spell; or destroy target creature with power 2 or less; or look at the top three cards of target player's library, then put one back and the rest into that player's graveyard.
Flying Sacrifice Judge’s Familiar: Counter target instant or sorcery spell unless its controller pays {1}.
Cathedral of War enters the battlefield tapped. Exalted (Whenever a creature you control attacks alone, that creature gets +1/+1 until end of turn.) T: Add 1 to your mana pool.
Flying, haste This creature attacks each combat if able. At the beginning of combat on your turn, if you control a creature with power 4 or greater, you may pay {R}. If you do, return this card from your graveyard to the battlefield.
Spectacle R Exile the top two cards of your library. Until the end of your next turn, you may play those cards.
T: Add 1 to your mana pool.T: Add R or G to your mana pool. Talisman of Impulse deals 1 damage to you.
When Chittering Witch enters the battlefield, create a number of 1/1 black Rat creature tokens equal to the number of opponents you have. 1B, Sacrifice a creature: Target creature gets -2/-2 until end of turn.