Budget Alternatives to Marwyn, the Nurturer

Celebrity Fencer $0.14 3W · Elf Druid Alliance — Whenever another creature you control enters, put a +1/+1 counter on this creature. Deeproot Elite $0.18 1G · Merfolk Warrior Whenever another Merfolk you control enters, put a +1/+1 counter on target Merfolk you control. Juniper Order Ranger $0.18 3GW · Human Knight Ranger Whenever another creature you control enters, put a +1/+1 counter on that creature and a +1/+1 co... Good-Fortune Unicorn $0.21 1GW · Unicorn Whenever another creature you control enters, put a +1/+1 counter on that creature. Rishkar, Peema Renegade $0.25 2G · Elf Druid When Rishkar enters, put a +1/+1 counter on each of up to two target creatures. Shelinda, Yevon Acolyte $0.27 GW · Human Cleric Lifelink Ivy Lane Denizen $0.28 3G · Elf Warrior Whenever another green creature you control enters, put a +1/+1 counter on target creature. Rocksteady, Mutant Marauder $0.30 2G · Rhino Mutant Partner with Bebop, Skull & Crossbones Legolas Greenleaf $0.31 2G · Elf Archer Reach Honored Dreyleader $0.34 2G · Squirrel Warrior Trample Yorvo, Lord of Garenbrig $0.35 GGG · Giant Noble Yorvo enters with four +1/+1 counters on it. Forerunner of the Heralds $0.36 3G · Merfolk Scout When this creature enters, you may search your library for a Merfolk card, reveal it, then shuffl... Valley Mightcaller $0.45 G · Frog Warrior Trample Kyler, Sigardian Emissary $0.59 3GW · Human Cleric Whenever another Human you control enters, put a +1/+1 counter on Kyler. Elvish Vanguard $0.61 1G · Elf Warrior Whenever another Elf enters, put a +1/+1 counter on this creature.