Mono Green
Green is the colour of purity, growth, wilderness, nature and free will. Green has the biggest creatures, is able to remove any kind of permanent on the battlefield and protects its own present. Green is famous of ramping and putting multiples lands on the table in a single turn.
Mono Green themes
Elf tribal
Elves are greens primary creature type since the beginning. Elf decks run a huge amount elf mana dorks and the are able to produce infinite and close-to-infinite amounts of mana, as the cards mana output increases with the amount of elves controlled. Elf tribals are combat focused.
Hydra tribal
Hydras are greens biggest and baddest creature type with many different creatures. Hydras are many-headed snake-like creatures and are often x-spells, where the spent mana is turned into a massive, single creature. Hydra decks creates massive creatures to attack and receives benefits from power-related synergies.
Stompers
As green has the best mana ramp options in the format, and the biggest creatures, too, it is only natural that big creatures / stompers decks are popular in mono green. Stomper decks have lots of ramp in them, and aim to cast big creatures to wreak havoc to the opponents.
Green +1/+1 counters
+1/+1 counters have excellent support in mono green. Multiple spells in green gives counters to the targeted creature controlled by the green player, and then have another effect combined with the counter. +1/+1 counter decks aims to receive massive bonuses from the counters in resources or either they try to grow multiple small creatures into big creatures with the counters.
Landfall
Landfall decks are causing landfall triggers with multiple lamp ramp spells. Often the triggers provide extra resources, +1/+1 counters or lifegain. Main wincons with landfall decks include: land creatures, +1/+1 creatures and massive value engines.