Budget Alternatives to Oran-Rief Hydra

Murasa Ranger $0.05 3G · Human Warrior Ranger Landfall — Whenever a land you control enters, you may pay {3}{G}. Fearless Fledgling $0.06 1W · Griffin Landfall — Whenever a land you control enters, put a +1/+1 counter on this creature. Prowling Felidar $0.08 3W · Cat Beast Vigilance Seedship Agrarian $0.12 3G · Insect Scientist Whenever this creature becomes tapped, create a Lander token. Territorial Scythecat $0.21 2G · Cat Trample Glyph Elemental $0.25 1W · Elemental Bestow {1}{W} Floral Evoker $0.26 2G · Snake Druid Landfall — Whenever a land you control enters, put a +1/+1 counter on this creature. Tireless Tracker $0.28 2G · Human Scout Landfall — Whenever a land you control enters, investigate. Ride the Shoopuf $0.29 1G · Enchantment Landfall — Whenever a land you control enters, put a +1/+1 counter on target creature you control. Roaring Earth $0.33 1G · Enchantment Landfall — Whenever a land you control enters, put a +1/+1 counter on target creature or Vehicle ... Vinelasher Kudzu $0.34 1G · Plant Landfall — Whenever a land you control enters, put a +1/+1 counter on this creature. Avenger of Zendikar $0.44 5GG · Elemental When this creature enters, create a 0/1 green Plant creature token for each land you control. Undergrowth Champion $0.67 1GG · Elemental If damage would be dealt to this creature while it has a +1/+1 counter on it, prevent that damage... Nissa of Shadowed Boughs $1.62 2BG · Nissa Landfall — Whenever a land you control enters, put a loyalty counter on Nissa.