Reveal the top X cards of your library. Put all land cards from among them onto the battlefield tapped and the rest on the bottom of your library in a random order.
Spell mastery -- If there are two or more instant and/or sorcery cards in your graveyard, untap those lands.
{6}{G}{G}
Archetype of Endurance
Enchantment Creature - Boar
Creatures you control have hexproof.
Creatures your opponents control lose hexproof and can't have or gain hexproof.
6 /
5
{3}{G}{G}
Asceticism
Enchantment
Creatures you control have hexproof. (They can't be the targets of spells or abilities your opponents control.)
{1}{G}: Regenerate target creature.
{5}{G}{G}
Avenger of Zendikar
Creature - Elemental
When Avenger of Zendikar enters the battlefield, create a 0/1 green Plant creature token for each land you control.
Landfall -- Whenever a land enters the battlefield under your control, you may put a +1/+1 counter on each Plant creature you control.
5 /
5
{2}{G}{G}
Bear Umbra
Enchantment - Aura
Enchant creature
Enchanted creature gets +2/+2 and has "Whenever this creature attacks, untap all lands you control."
Totem armor (If enchanted creature would be destroyed, instead remove all damage from it and destroy this Aura.)
{4}{G/U}{G/U}{G/U}
Biomantic Mastery
Sorcery
Draw a card for each creature target player controls, then draw a card for each creature another target player controls.
{X}{G/U}{G/U}
Biomass Mutation
Instant
Creatures you control have base power and toughness X/X until end of turn.
{X}{U}{U}{U}
Blue Sun's Zenith
Instant
Target player draws X cards. Shuffle Blue Sun's Zenith into its owner's library.
{1}{G}{U}
Bred for the Hunt
Enchantment
Whenever a creature you control with a +1/+1 counter on it deals combat damage to a player, you may draw a card.
{4}{U}
Broodbirth Viper
Creature - Snake
Myriad (Whenever this creature attacks, for each opponent other than defending player, you may create a token that's a copy of this creature that's tapped and attacking that player or a planeswalker they control. Exile the tokens at end of combat.)
Whenever Broodbirth Viper deals combat damage to a player, you may draw a card.
3 /
3
{7}{U}{U}
Clone Legion
Sorcery
For each creature target player controls, create a token that's a copy of that creature.
{G}
Collective Voyage
Sorcery
Join forces -- Starting with you, each player may pay any amount of mana. Each player searches their library for up to X basic land cards, where X is the total amount of mana paid this way, puts them onto the battlefield tapped, then shuffles.
{1}{G}{G}
Courser of Kruphix
Enchantment Creature - Centaur
Play with the top card of your library revealed.
You may play lands from the top of your library.
Landfall -- Whenever a land enters the battlefield under your control, you gain 1 life.
2 /
4
{2}{G}
Cultivate
Sorcery
Search your library for up to two basic land cards, reveal those cards, put one onto the battlefield tapped and the other into your hand, then shuffle.
{1}{U}
Cyclonic Rift
Instant
Return target nonland permanent you don't control to its owner's hand.
Overload {6}{U} (You may cast this spell for its overload cost. If you do, change "target" in its text to "each.")
{1}{U}{U}
Dictate of Kruphix
Enchantment
Flash
At the beginning of each player's draw step, that player draws an additional card.
{2}
Doubling Cube
Artifact
{3}, {T}: Double the amount of each type of unspent mana you have.
{G}
Elvish Mystic
Creature - Elf Druid
{T}: Add {G}.
1 /
1
{3}{G}
Frontier Siege
Enchantment
As Frontier Siege enters the battlefield, choose Khans or Dragons.
• Khans -- At the beginning of each of your main phases, add {G}{G}.
• Dragons -- Whenever a creature with flying enters the battlefield under your control, you may have it fight target creature you don't control.
{X}{G}{G}
Genesis Hydra
Creature - Plant Hydra
When you cast this spell, reveal the top X cards of your library. You may put a nonland permanent card with mana value X or less from among them onto the battlefield. Then shuffle the rest into your library.
Genesis Hydra enters the battlefield with X +1/+1 counters on it.
0 /
0
--
Homeward Path
Land
{T}: Add {C}.
{T}: Each player gains control of all creatures they own.
{X}{G}{G}
Hooded Hydra
Creature - Snake Hydra
Hooded Hydra enters the battlefield with X +1/+1 counters on it.
When Hooded Hydra dies, create a 1/1 green Snake creature token for each +1/+1 counter on it.
Morph {3}{G}{G}
As Hooded Hydra is turned face up, put five +1/+1 counters on it.
0 /
0
{4}{G}{G}
Hydra Broodmaster
Creature - Hydra
{X}{X}{G}: Monstrosity X. (If this creature isn't monstrous, put X +1/+1 counters on it and it becomes monstrous.)
When Hydra Broodmaster becomes monstrous, create X X/X green Hydra creature tokens.
7 /
7
{3}{G}{G}
Kalonian Hydra
Creature - Hydra
Trample
Kalonian Hydra enters the battlefield with four +1/+1 counters on it.
Whenever Kalonian Hydra attacks, double the number of +1/+1 counters on each creature you control.
0 /
0
{X}{G}{G}{G}
Lifeblood Hydra
Creature - Hydra
Trample
Lifeblood Hydra enters the battlefield with X +1/+1 counters on it.
When Lifeblood Hydra dies, you gain life and draw cards equal to its power.
0 /
0
{2}{G}{G}
Polukranos, World Eater
Legendary Creature - Hydra
{X}{X}{G}: Monstrosity X. (If this creature isn't monstrous, put X +1/+1 counters on it and it becomes monstrous.)
When Polukranos, World Eater becomes monstrous, it deals X damage divided as you choose among any number of target creatures your opponents control. Each of those creatures deals damage equal to its power to Polukranos.
5 /
5
{X}{G}{G}
Primordial Hydra
Creature - Hydra
Primordial Hydra enters the battlefield with X +1/+1 counters on it.
At the beginning of your upkeep, double the number of +1/+1 counters on Primordial Hydra.
Primordial Hydra has trample as long as it has ten or more +1/+1 counters on it.
0 /
0
{5}{G}{G}
Protean Hulk
Creature - Beast
When Protean Hulk dies, search your library for any number of creature cards with total mana value 6 or less, put them onto the battlefield, then shuffle.
6 /
6
{2}{G}
Rites of Flourishing
Enchantment
At the beginning of each player's draw step, that player draws an additional card.
Each player may play an additional land on each of their turns.
{G}{G}
Avatar of the Resolute
Creature - Avatar
Reach, trample
Avatar of the Resolute enters the battlefield with a +1/+1 counter on it for each other creature you control with a +1/+1 counter on it.
3 /
2
{1}{G}
Bloom Tender
Creature - Elf Druid
{T}: For each color among permanents you control, add one mana of that color.
1 /
1
{6}{G}
Boundless Realms
Sorcery
Search your library for up to X basic land cards, where X is the number of lands you control, put them onto the battlefield tapped, then shuffle.