Manahive

“Graham O’Brien” is a legendary creature that rewards you for creatures entering the battlefield under your control with counters and life gain. Equivalent cards in white (the same color) include:

• “Cathars' Crusade” (puts +1/+1 counters as creatures ETB)
• “Ajani's Welcome” (gain life when creatures ETB)
• “Archangel of Thune” (whenever you gain life, creatures get counters)

Reason: Each card supports or rewards creature ETBs or life gain, like “Graham O'Brien”.